题目内容

You will never know the result ___________ you try.

A. even though
B. in case
C. whenever
D. until

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His novel is a great success and it is well ___________.

A. received
B. accepted
C. picked
D. popular

More natural resources should be made use of _ the _ need of energy.

A. meeting; increasing
B. to meet; increased
C. meeting; increased
D. to meet; increasing

The artist _ the headmaster gave a prize is the teacher I have been taught for two years.

A. from whom; by whom
B. to whom; who
C. from whom; who
D. to whom; by whom

When first ___________ into the market, these products enjoyed great success.

A. introducing
B. introduced
C. introduce
D. being introduced