A、 without
B、 under
C、 with
D、 for
答案:A
A、 without
B、 under
C、 with
D、 for
答案:A
A. π
B. 2π
C. π/2
D. π/4
A. heavier;best
B. heavy;the best
C. heavier;the best
D. heavy;better
A. To;of
B. At;at
C. To;in
D. In;about
A. sits
B. sat
C. is sitting
D. was sitting
A. planted
B. plants
C. will plant
D. is planting
A. so
B. very
C. too
D. much
A. 14
B. 21
C. 28
D. 35
A. educate
B. be educating
C. have educated
D. be educated
A. 4
B. 3
C. 2
D. 1
A. a
B. an
C. the
D. /