1 . In any unsafe situation, simply ________ the button and a highly-trained agent will get you the help you need.

A．press	B．to press
C．pressing	D．pressed

2 . I ________down to London when I suddenly found that I was on the wrong road.

A．was driving	B．have driven
C．would drive	D．drove

3 . It suddenly occurred to him ________ he had left his keys in the office.

A．whether	B．where
C．which	D．that

4 . 阅读下列材料，在空白处填入适当内容(1个单词)或填入括号内单词的正确形式。

I felt butterflies in my stomach when I started calligraphy class ten years ago. I wondered what I was doing there. At that moment, I couldn't have known that I'd just made one of the best     1    (choose) of my life.

I sat down and listened to the teacher introducing the tools of the craft. Then     2     was the first time for me that I had tried my hand. I took up the brush, using the correct gesture,     3    (dip) it in the ink, and carefully wrote "one"     4     Chinese.

Over     5     past five years, I have learned to make versions of well-known poems. Calligraphy seemed like a bridge,     6     connected me to authors from centuries past. Stroke(笔画) by stroke, word by word, I could feel their emotions, cherished my own peace and learned     7     (appreciate) my daily life.

Now, calligraphy is not just a hobby,     8    a way to remove myself from the worries of life. Rolling out the paper, I can write for a whole day. Calligraphy     9     (able) me to balance my busy schedule and live     10     (peace).

5 . That was not the first time he ____ us. I think it's high time we ____ strong actions against him.

A．betrayed, take	B．had betrayed, took
C．has betrayed, took	D．has betrayed, take

6 . How long will it be ________ he finishes his homework? （用适当的词填空）

7 . The police __________ the murderer everywhere when he suddenly appeared in a theatre.

A．is searching

B．were searching

C．are searching for

D．were searching for

8 . Tom was about to close the window　　　　his attention was caught by a bird.

A．when	B．if
C．and	D．till

9 . The boy seldom helps his parents with the housework; ________.

A．nor does his sister	B．so his sister does
C．neither his sister does	D．so does his sister

10 . It suddenly _______ to the detective that the professor was probably murdered by his own wife.

A．occurred	B．came about
C．took place	D．happened