1 . 阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

A stone tablet(牌匾)    1    (date) back to the year 1693, which falls within the Qing Dynasty(1644—1911), was discovered in Daming County, north China’s Hebei Province, said local authorities.

The tablet,    2     (find) in Jindong Village, measures 1.4 meters high, 0.61 meters wide, and 0.14 meters thick. Made of bluestone, it has     3     total of 307 characters on it.

The inscription(碑文)recorded the process of building the King of Medicine Temple in the county during the reign of Emperor Kangxi and     4     (describe) the grand occasions of temple fairs and humanistic stories at that time.

According to the inscription, after the     5     (complete) of the temple, the local medicine expert meeting     6    (organize) here on April 28 in most years of the Qing Dynasty, during     7     all kinds of talented people performed, and the vocal music lasted for more than ten days, said Wang Jianping, an expert in literature and history of the county.

This stone tablet is     8     (relative) well preserved with clear characters, which is significant for studying cultural and economic     9    (activity) in the southern part of Hebei during the Qing Dynasty. It also provides evidence     10     the researchers about the development of local pharmacies(制药), Wang said.

2 . 阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

More than 500 items were discovered at Sanxingdui Ruins site in southwest China’s Sichuan Province. These items, including remains of a gold mask,     1    (dig) in one of China’s     2    (significant) excavations(n. 发掘) ever.

Sanxingdui is believed to have sat at the heart of the Shu state,     3     historians know relatively little about due to rare     4    (write) records.     5    (discovery) made at the site date from the 12th and 11th centuries BC, and many of the items are now on show at an on-site museum. The site has changed experts understanding of     6     civilization developed in ancient China.

Archaeologists(考古学家) realized they had just got     7     excellent chance to study ancient culture     8    (date) back between 3,000 and 5,000 years.     9     particular, evidence of a unique Shu culture suggests that the kingdom     10    (develop) independently of neighboring societies in the Yellow River Valley, which was traditionally considered to be the cradle(摇篮) of Chinese civilization.

3 . In April 2018, a group of Canadian scientists flying in a helicopter (直升飞机) discovered something they didn't expect to see — a huge, unknown cave with an opening the size of a football field.

The cave was discovered in the northern part of Wells Gray Provincial Park, in a wild, faraway area of Canada's Cariboo Mountains. The area is hard to get to and even harder to travel through. It is covered with snow for much of the year.   

The group told Catherine Hickson, a scientist who studies rocks, about the cave. Dr. Hickson got a team of researchers together to study it. In September, they went for a closer look after most of the snow melted (融化). The cave is one of the largest in Canada. Not only is the opening to the cave larger than a football field, the cave is also deep. The team couldn't measure (测量) all the way to the bottom, but they think it may be more than 180 meters deep. The cave is tens of thousands of years old. But the rock in the cave is made of used to be at the bottom of an ocean (海洋). It is hundreds of millions of years old.

A small, but fast river of melting snow leads into the cave on one side, creating a waterfall near the top and a river at the bottom. The water comes out again a long way away. The exit (出口) is about 2.1 kilometers away and about l/2 kilometer lower down.

The cave will have to wait to get an official name. For now, the cave is being called "Sarlacc's Pit "because it looks similar to the home of the Sarlacc, a person in the Star Wars movie Return of the Jedi.

For Dr. Hickson, there's a lesson to be learned from the cave. "It shows you that you don't know everything, "she says." There are things yet to be discovered."

1. Why did the cave remain unknown in the past?

A．It is in a wild mountain area.	B．It has been there for just a few years.
C．Its opening is too small to be noticed.	D．The weather there is cold all year round.

2. What are Paragraphs 4 and 5 mainly about?

A．The history of the cave.	B．Some facts about the cave.
C．The value of studying the cave.	D．The methods of studying the cave.

3. What does the underlined word "It" in Paragraph 4 refer to?

A．The snow.

B．The river.

C．The ocean.

D．The rock.

4. The cave's name "Sarlace's Pit" has something to do with ________.

A．local culture

B．its discoverers

C．the way it looks

D．the name of a film star