There was so serious a matter that I had no choice but _________ the police.
| A．called in | B．calling on | C．call for | D．to call in |
---What’s wrong with my stomach?
---There is nothing serious; you can __________.
| A．take it easy | B．take your time | C．take it seriously | D．take risks |
It was the training _____ he had as a young man _____ made him such a good engineer.
| A．what; that | B．that; what | C．that; which | D．which; that |
It was not until he came back _____ he knew the police were looking for him.
| A．which | B．since | C．that | D．before |
I hate _____ when the light turns red and the people don’t move until it is about to turn green again.
| A．it | B．that | C．these | D．them |
______ today, he would get to Germany by Friday.
| A．Was he leaving | B．Were he to leave | C．Would he leave | D．If he leaves |