A、 need
B、 must
C、 may
D、 has to
答案:C
A、 need
B、 must
C、 may
D、 has to
答案:C
A. can
B. must
C. should
D. is supposed to
A. in
B. with
C. about
D. for
A. so
B. and
C. or
D. but
A. early
B. quietly
C. slowly
D. politely
A. watches
B. watched
C. was watching
D. had watched
A. his
B. her
C. their
D. your
A. {x|-3<x<3}
B. {x|x>3或x<-3}
C. {x|-3≤x<3}
D. {x|x≥3或x<-3}
A. though
B. before
C. because
D. since
A. is
B. are
C. were
D. /
A. pick it up
B. put it on
C. give it out
D. take it off