Everyonedo his best for the modernization of his country.
A. can
B. may
C. should
D. had to
Sorry, I didn't hear the ring. Ithe kitchen when you phoned.
A. must have been
B. must be
C. can be
D. could have been
Susan and I can go to the lecture.
A. but neither can Charles
B. and so Charles can
C. but Charles can't
D. and Charles can also
Youyour tooth pulled out before it rot completely.
A. had better got
B. had to get better
C. had better to get
D. had better get
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