4．In the skills of driving, we are neck and neck. But when ______ comes to cooking, I am no match for my brother.

A. there　 　　　　　　　　　　　　　　　　　 B. what

C. one　 　　　　　　　　　　　　　　　　　　 D. it

3．______ with the new machine, the explorers went into the cave, hoping to find the buried treasure.

A. Equipping　 　　　　　　　　　　　　　 B. Equipped

C. Being equipped　 　　　　　　　　　 D. Having equipped

2．-So the guard didn’t let you in?

-No, ______ I told him I came at the invitation of the headmaster.

A. even if　 　　　　　　　　　　　　　　　 B. as if

C. until　 　　　　　　　　　　　　　　　　　 D. since

1．I tried to concentrate on my lessons, but it was often the case that my attention ______ soon after classes began.

A. arose　　　　　　　　 B. registered

C. wandered　 　　　　　　　　　　　　　　 D. volunteered

10．make good use of our time

9．is made from grass; is made (tempered) into steel

8．I dropped in on my teacher

7．I couldn’t recognize his voice

6．conducted a large number of experiments

5．he has a sharp (keen) sense of smell