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
推荐题目
I wondered what great difficulty he had ________ the plan.
#89809
A
to carry out
B
carrying out
C
carried out
D
with carrying out
Mr. Andrew taught his students how to develop the basic skills in the physics class, ______ everything through jokes and experiments.
#92818
A
to explain
B
explained
C
explaining
D
explains
Properly _______ with numbers, the books can be easily found.
#97433
A
marked
B
mark
C
to mark
D
marking
In April, thousands of holidaymakers remained ______ abroad due to the volcanic ash cloud.
#90617
A
sticking
B
to be stuck
C
stuck
D
to have stuck
Your cousin is said ________ a new computer program recently, but do you know when he will finish it?
#88521
A
to design
B
designing
C
to have been designing
D
to have designed