【推荐1】We are looking forward to the________（explore）of Mars. （所给词的适当形式填空）

【推荐2】As I adventured into the heart of the city, the Old Town’s ancient waterways led me on an ________ (explore) of history, and the classical gardens offered a glimpse into a storied past. (所给词的适当形式填空)

【推荐3】While high school does not generally encourage students to explore new aspect of life, college set the stage for that __________ (explore). （用所给单词适当形式填空）

【推荐1】We should spare no effort to protect the endangered animals from____(extinct). (所给词的适当形式填空)

【推荐2】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。

So far, China Eastern Airlines    1    (receive) approval(批准)fiom the Ministry oflndustry and Information Technology to offer in- flight Wi-Fi service on 21 airplanes.

The carrier becomes China's first airline company    2    （provide) Wi-Fi service for both domestic and international flights. Passengers    3    (leave) for New York, Los Angeles, San Francisco, Toronto, Beijing and Guangzhou will have access    4    me Wi-Fi service through a telecommunication satellite.

The flights will begin to provide the service in one month after operational    5    （prepare). The Wi-Fi service will be free in the 21 airplanes at the beginning,    6    a charge list is now under discussion.

The company plans to put in Wi-Fi service    7    (equip) in all airplanes by 2019-2020. Other carriers in China, such as Air China and Hainan Airlines also have been following this attempt in some oftheir flights during the past few years.

Industry experts note that    8    approval for the Wi-Fi service on 21 airplanes.is a trial for commercial in-flight Internet service operations in China. Aviation(航空)business staff say that China has the potential to become the world's     9    (large) aviation market,    10    is likely to create tens of billions of yuan in profit in the aviation Internet business.

【推荐3】What is amazing is that the________ (wise) of ancient people was limitless. (所给词的适当形式填空)