________ repeatedly, the problem still appeared in the beginners’ homework.
#100762
A
Explaining
B
Having explained
C
Having been explained
D
To be explained
推荐题目
______ over and over again, but he still couldn’t understand.
#103480
A
Having explained
B
Having been explained
C
Explaining
D
It had been explained
I can guess you were in a hurry. You      your sweater inside out .
#103993
A
had worn
B
are wearing
C
were having on
D
were dressing