问题
选择题
I failed in the examination last week and I regret _____________ hard.
A.not to study
B.not studying
C.have not studied
D.did not study
答案
答案:B
I failed in the examination last week and I regret _____________ hard.
A.not to study
B.not studying
C.have not studied
D.did not study
答案:B