语法词汇练习 语法大全 语法详解 英语听力 
      how to solve the problem, the little boy turned to his father for help.
#96894
A
Not knowing
B
Having not known
C
Not having been known
D
Not known
下一题
推荐题目
Paul doesn't have to be made ___. He always works hard.
#97795
A
learn
B
to learn
C
learned
D
learning
  In freezing weather, snow can turn into ice, which is easy to ________.
#88284
A
be slipped
B
slip
C
slip on
D
be slipping
 Now I regret ______ those weight-loss pills.
#90553
A
took
B
taking
C
taken
D
to take
---What made you so angry?
#96167
A
Mary’s leaving, instead of
B
Mary’s left, instead of
C
Mary’s leaving, without
D
Mary”s leaving, instead
The highway　　 to the city is under repair now.
#98007
A
leads
B
led
C
to lead
D
leading