Life is like riding a bicycle. ________ your balance, you must keep moving.
#88520
A
Keeping
B
To keep
C
Keep
D
Being kept
推荐题目
The children were playing games on the playground, ________ school uniforms.
#95561
A
all of them wore
B
all wearing
C
all of whom wearing
D
all were wearing
I am looking forward to ______ your answer as soon as possible.
#97242
A
receiving
B
being received
C
receive
D
be received
We’re conducting a nationwide survey of people’s reading habits. Would you have five minutes ________ a few questions?
#89904
A
answering
B
to answer
C
to have answered
D
having answered
A total of 264,302 people in the country were reported __________ with HIV by the end of last September.
#92643
A
to have been infected
B
to be infected
C
to having been infected
D
to have infected