________scores of times, but Derek still couldn’t understand how to use past participle in a concrete situation.
#32441
A
Having explained
B
Having been explained
C
Though it was explained
D
It was explained
推荐题目
A curve is a line ______ no part is straight and which has no angle.
#30518
A
that
B
whose
C
in which
D
of which
——Your friend Alice looks down today. What is up?——Well, ________ happened to her was her own fault!
#31998
A
wherever
B
However
C
whatever
D
No matter what
Mr. Black has been teaching English in a middle school _____ he came to China.
#33534
A
for ever
B
ever since
C
since then
D
long before