A、 must be
B、 can be
C、 would be
D、 could be
答案:A
A、 must be
B、 can be
C、 would be
D、 could be
答案:A
A. appeared
B. happened
C. occurred
D. emerged
A. am
B. is
C. are
D. be
A. Oh, no. That's OK!
B. How do you like it?
C. Which do you prefer?
D. Would you like to try it on?