(2013·凉山一模)Life is like riding a bicycle. ________ your balance, you must keep moving.
#89279
A
Keeping
B
To keep
C
Keep
D
Being kept
推荐题目
(2013·福建，22)________ basic first－aid techniques will help you respond quickly to emergencies.
#89233
A
Known
B
Having known
C
Knowing
D
Being known
_________ that he had fallen behind,he tried to work harder.
#98399
A
Having realized
B
Realized
C
Realize
D
To realize
Are you going to attend the meeting_____ next Saturday?
#98815
A
holding
B
held
C
which will hold
D
to be held
He tried many times to squeeze out of the fence to see the open-air film _______ each time.
#98709
A
only to catch
B
unluckily caught
C
always being caught
D
only to be caught
Hearing the news, she rushed out, _____ the book _____ on the table, and disappeared into the distance.
#94145
A
left; lain open
B
left; lay open
C
leaving; lie opened
D
leaving; lying open