We will sign the contract with the dealer, ________ he can promise to offer us the guarantees of the products.
A. as far as
B. even if
C. as long as
D. unless
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If the pressure is not _________ immediately, there may be an explosion.
A. relieved
B. retreated
C. revealed
D. released
Though faced with great difficulties, 65-year-old Thomas would not ________ karate learning.
A. give up
B. give out
C. give back
D. give in
________ I wanted to find out first was when he came back last Saturday evening.
A. That
B. Those
C. What
D. Which
________ you watered the little tree frequently, it ________ as tall as I am now.
A. Had, would be
B. Have, is
C. If, would be
D. Should, could be