16)She ______ such a big fire before.
Chọn đáp án:
A. has never seen
B. have never seen
C. didn't see
D. seen
17)We ____ them since 2010.
Chọn đáp án:
A. has met
B. had met
C. haven't met
D. met
18)He has learned English ________ 4 years.
Chọn đáp án:
A. since
B. until
C. in
D. for
19)He _________ here for six months.
Chọn đáp án:
A. have been
B. has been being
C. has been being
D. has been
làm ơn giúp
Loga
Sinh Học lớp 12
