(单选题)2: 冲量指窄脉冲的（）。 A: 高度 B: 频率 C: 面积 D: 能量 ...

(单选题)22: I forgot to ring up Mr. Wang yesterday, so I _______ today. A: can do it B: must do it C: had to do it D: must have to do it ...

(单选题)16: "I must be going now.""Oh, it's still early, _____ you stay a bit longer?" A: will B: wouldn't C: won't D: can ...

(单选题)4: — Congratulations! You won the first prize in today’s speech contest. — ____________________ A: Yes, I beat the others B: No, no, I didn’t do it well. C: Thank you D: It’s a pleasure. ...

(单选题)17: I needn't have taken a taxi. I______, it was only a hundred meters. A: could walk B: should walk C: could have walked D: ought to walk ...

(单选题)24: I don’t know why she avoids _______ her opinion on the subject. A: to give B: to be given C: giving D: being given ...

(单选题)12: I can’t find the key _____the door. Maybe I lost it. A: to B: of C: with D: for ...

(单选题)6: She is one of the newest film stars from America and has many fans, ________ in Europe. A: specially B: particularly C: partially D: specifically ...

(单选题)7: If I do Aunt Ivy's shopping this week, Ben __________ do it for her next week. A: needn't have to B: won't have to C: mustn't have to D: can't have to ...

(单选题)8: I’m calling about the apartment you ________ the other day. Could you tell me more about it? A: advertised B: had advertised C: are advertising D: will advertise ...