He ______ sleep, although he tried to, when he got on such a hunt for an idea until he had caught it.
| A．wouldn’t | B．shouldn’t | C．couldn’t | D．mustn’t |
—Listen! There is a knock on the door. Who _____ it be?
—It must be Jack. Just now I sent for him.
| A．shall | B．can | C．must | D．might |
—What made her so happy?
—_____ her son passed the driving test.
| A．That | B．Because | C．Since | D．When |
I would have come earlier, but I _____ that you were waiting for me.
| A．didn’t know | B．hadn’t known |
| C．haven’t known | D．wouldn’t have known |
During the opening ceremony, “Miss Smile” has won the hearts of Chinese Internet users after being caught _____ the same smile for nearly 20 minutes.
| A．fixed | B．to be fixed | C．to fix | D．fixing |
Things like eye contact and hand gestures _____ great importance in situations such as job interviews.
| A．take in | B．take off | C．take on | D．take down |