单项选择题

We will not attack () we are attacked; if attacked, we will certainly counter-attack.

A. if
B. when
C. unless
D. even if

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单项选择题
Is it the watch you want ().

A. to have it repaired
B. to repair it
C. to have repaired
D. to have repaired it
单项选择题
I () to speak to you all these days.

A. wanted
B. have wanted
C. shall want
D. shall be wanting
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