1 . Children, when ______ by their parents, are allowed to enter the workshop.

A．accompanying

B．accompanied

C．to accompany

D．accompany

2 . He is the only one of the students who          very diligent.

A．was

B．were

C．are

D．is

3 . However, Tu Youyou had an idea          Chinese herbs might hold the secret.

A．that

B．which

C．what

D．whether

4 . As you can see, the reason          I’m here to tell you the story is          I made the right decision.

A．that; that

B．that; why

C．why; that

D．why; why

5 . During the polar summer of 1910-1911, both teams organized food bases in preparation for their journeys the next year. Then          the total darkness of the polar winter.

A．came

B．comes

C．come

D．coming

6 . The film brought the hours back to me ________ I was taken good care of in that far-away village.

A．when

B．until

C．that

D．where

7 . Even though Tu Youyou is not interested in fame, she has become a scientist          work is internationally renowned.

A．which

B．where

C．whose

D．as

8 . One day, my two brothers and I were coming back from the islands          we often risked going and got more fish than others.

A．that

B．which

C．when

D．where

9 . In the dark street, there wasn’t a single person          she should turn for help.

A．to which

B．to whom

C．into whom

D．into which

10 . The professor and writer ________invited to make a speech at the meeting.

A．has

B．have

C．are

D．is