____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
In April, 2009, President Hu inspected the warships in Qingdao, ________ the 60th anniversary of the founding of the PLA Navy.
#90423
A
marking
B
marked
C
having marked
D
being marked
______ in the chimney for five hours, the thief looked very pale and tired
#95394
A
Having been trapped
B
Being trapped
C
trapping
D
Having trapped
The typewriter _______ there all week.
#97964
A
was laying on the table, were it had laid
B
was lying on the table, were it had laid
C
was laying on the table, were it had laid
D
lying on the table, had been laid
_______ in a friendly way, their quarrel came to an end.
#94239
A
Being settled
B
Settled
C
Settling
D
Having settled
The ______ addicted to ______ computer games made his mother worried.
#93456
A
child was; playing
B
child was; play
C
child; playing
D
child’s being; playing