____several times，but unfortunately，the boy still couldn’t smooth away the problem on his own.
#98193
A
Having been explained
B
The problem having been explained
C
The problem had been explained
D
Although the problem had been explained
推荐题目
My friends and I are making an area to encourage birds _________.
#96661
A
come and feed and lay their eggs safely
B
to come and feed and lie their eggs safely
C
to come and feed and lay their eggs safety
D
to come and feed and lay their eggs safely
As we drew closer, I could see a whale ____________ by a pack of about six other killers.
#95952
A
attacking
B
being attacked
C
attack
D
to attack
As a result of the serious flood，two thirds of the buildings in the area ______.
#98130
A
needs repairing
B
need repairing
C
need to repair
D
needs to be repaired
Among the most important questions the journalists wanted _____was how Greece could overcome economic crisis ?
#97217
A
to answer
B
being answered
C
answering
D
answered