I always regret not         harder when I was young .
#97664
A
studying
B
having studied
C
to study
D
to have studied
推荐题目
_________ the meeting room, he found all the parents already ________ there.
#93849
A
To enter, sitting
B
Stepping into, to seat
C
Entering, seated
D
Entered, seat
I don’t know the girl _______ in the storm.
#95695
A
to catch
B
caught
C
catching
D
to be catching
All of us consider it wrong ___ in the exam.
#98690
A
to be cheated
B
have cheated
C
to cheat
D
having been cheated