A、 had been; has seen
B、 have been; have seen
C、 had been; had seen
D、 have been; had seen
答案:答案D
A、 had been; has seen
B、 have been; have seen
C、 had been; had seen
D、 have been; had seen
答案:答案D
A. Don't you meet him yet
B. Hadn't you met him yet
C. Didn't you meet him yet
D. Haven't you met him yet
A. has left; comes
B. left; had come
C. had left; came
D. had left; would come
A. was made use
B. made use
C. was made use of
D. made use of
A. is changing
B. has changed
C. will have changed
D. will change
A. will not be; will know
B. is; will know
C. will not be; know
D. is; know
A. promised
B. were promised
C. have promised
D. have been promised
A. I'm not noticing
B. I wasn't noticing
C. I haven't noticed
D. I don't notice
A. is discussed
B. has been discussed
C. is going to be discussed
D. will have been discussed
A. promises
B. promised
C. will promise
D. had promised
A. are having
B. have
C. have had
D. had had