___________ the chapter four times, and I finally understand the author’s theory.
#94567
A
Reading
B
Having read
C
To read
D
Read
推荐题目
Don't pretend ________ when you don't.
#88672
A
knowing
B
know
C
to know
D
to knowing
The library needs __, but it will have to wait until Sunday.
#98110
A
cleaning
B
to clean
C
clean
D
being cleaned
He reached the station _____ only _____ that the train had just left. 
#98773
A
tired;learned
B
tiring;learning
C
to tire;to learn
D
tired;to learn