单项选择题

In this passage "unstable" means （）

A. frightening
B. fast
C. shaky
D. undesirable

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单项选择题

The phrase they do the chewing makes the rocks seem as though they are（）

A. important
B. alive
C. dangerous
D. uncomfortable

单项选择题

58（）

A. see you tomorrow
B. I have your name
C. check in
D. I have one
E. to take a look
F. you want
G. are you interested in
H. I have to put you in the waiting list