22、Despite the fact that Betty is a lovely girl, she     be extremely difficult to work with sometimes.

A．must          B．should            C．would          D．can

21、---How much do I owe you for this beautiful vase?

---        .It’s a gift.

A．You’re welcome         B．That’s right       C．With pleasure          D．Forget it

20、The first time I met David in the Central Park, both of us felt that we      each other for ages.

A．knew        B．have known           C．had known           D．know

19、James Williams is my favorite professor; his speech is always brief, clear and        the point.

A．to          B．on           C．at         D．of

18、Newly-developed materials for spaceships can         extreme weather conditions.

A．hold        B．support        C．stand         D．carry

17、---Mary, you didn’t show up at the meeting last week?

---No, I        , but my son had a sudden fever and I had to stay at home to take care of him.

A．didn’t          B．was going to          C．had to          D．wouldn’t

16、---How did the interview go?

---Quiet well. Not so smoothly as I expected,         .

A．instead            B．either         C．though          D．as well

15、Although going to school       most of their time, students in the country always help the parents with the house-work.

A．takes up         B．makes up              C．uses up          D．saves up

14、I wrote emails to my sister and brother last week. To my disappointment,       of them wrote me back.

A．either        B．none          C．neither        D．nobody

13、After I became the manager, few occasions could I find      I have the time to sit down and enjoy a quiet dinner with my wife.

A．that        B．which         C．why       D．when