A、 going over
B、 went over
C、 go over
D、 to go over
答案:C
A、 going over
B、 went over
C、 go over
D、 to go over
答案:C
A. serious
B. more serious
C. most serious
D. the most serious
A. sad
B. sadness
C. saddest
D. sadly
A. on
B. at
C. in
D. of
A. not to be late
B. not being late
C. to be late
D. being late
A. 5个
B. 6个
C. 7个
D. 8个
A. ac>bc
B. ac<bc
C. a-b>a-c
D. a+b>a+c
A. was
B. were
C. is
D. are
A. Don't
B. Doesn't
C. Aren't
D. Can't
A. was traveling
B. is traveling
C. traveled
D. travels
A. need
B. must
C. may
D. has to