____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
The traffic rule says young children under the age of four and ____ less than 40 pounds must be in a child safety seat.
#94103
A
being weighed
B
to weigh
C
weighed
D
weighing
Fishing is his favorite hobby, and _______.
#98632
A
he’d like to collect coins as well
B
he feels like collecting coins, too
C
to collect coins is also his hobby
D
collecting coins also gives him great pleasure
With his mother_______ him, he is getting on well with his work.
#95469
A
helping
B
to help
C
help
D
helped
Returning to the room, _____.
#98271
A
the book was lost
B
I found the book missing
C
the book was missing
D
I found the losing book