Choose the answer among A, B, C, D to complete each of the sentences below:
Many university students _______ spent their summer vacations teaching illiterate people to read and write.
A.consciously
B.freely
C.gradually
D.voluntarily

Choose the answer among A, B, C, D to complete each of the sentences below:
The 27-year-old Soviet cosmonaut became the first person to eat and drink in ______.
A.weight
B.weightlessness
C.weightless
D.weighting

Choose the answer among A, B, C, D to complete each of the sentences below:
The Great Wall is China's most popular ______.
A.construction
B.impression
C.attraction
D.contribution

Choose the answer among A, B, C, D to complete each of the sentences below:
I agree with most of what you said, but I can't _____ your idea of letting children leave school at 14.
A.go along with
B.put up with
C.keep up with
D.catch up with

Choose the answer among A, B, C, D to complete each of the sentences below:
Eating out is the national ______ in France.
A.hobby
B.interest
C.game
D.pastime

Choose the answer among A, B, C, D to complete each of the sentences below:
We _____ to several sports channels on television.
A.offer
B.notify
C.deliver
D.subscribe

Choose the answer among A, B, C, D to complete each of the sentences below:
I hate camping because I can't ______ an umbrella tent in the wind and I can't make a fire in the rain.
A.turn round
B.take over
C.put up
D.set off

Choose the answer among A, B, C, D to complete each of the sentences below:
Children are always ______ about Tet holiday.
A.interested
B.concerned
C.keen
D.excited

Choose the answer among A, B, C, D to complete each of the sentences below:
The work of the charity is funded by voluntary ______.
A.movements
B.teenagers
C.donations
D.campaigns

Choose the answer among A, B, C, D to complete each of the sentences below:
Our field _____ have performed very well.
A.artists
B.sportmen
C.athletes
D.specialists