Once _____ , the machine will keep running.
#94334
A
start
B
started
C
to start
D
starting
推荐题目
_______ a chance, we are bound to visit the 2010 Shanghai EXPO.
#97138
A
To be given
B
Given
C
Giving
D
Having given
A few days after the interview, I received a letter ___________ me admission to the university.
#90298
A
offering
B
offered
C
having offered
D
to be offered
______ twice, the postman refused to deliver our letters unless we chained our dog.
#95354
A
Being bitten
B
Bitten
C
Having bitten
D
To be bitten
—What’s your impression of the Great Wall?—Wonderful! Once , it can never be forgotten.
#96766
A
seen
B
seeing
C
being seen
D
saw
---Why was the young lady taken away by the police?---- She happened _______ something in the supermarket.
#94169
A
to catch stealing
B
to catch to steal
C
to be caught stealing
D
to be caught to steal