题目内容

7. I haven’t seen my best friend for a long time, but ________ we’ll have the chance to meet soon.

A. suddenly
B. hopefully
C. recovery
D. unfortunately

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8. Sally would love to come to the party, but ________ she has to study tonight.

A. fortunately
B. suddenly
C. hopefully
D. unfortunately

9. We’re trying to ________ our daughter to take up a sport, as she isn’t very active.

A. choke
B. encourage
C. remark
D. shout

10. It’s so hot that I can hardly ________in here!

A. breathe
B. choke
C. blow
D. encourage

做简谐振动的物体,当它每次经过同一位置时,可能不同的物理量是( )

A. 位移
B. 速度
C. 动能
D. 恢复力