单项选择题

The ______ problem of bring a space-ship back from the moon has been solved.

A. technical
B. technological
C. technique
D. technology
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单项选择题
Animal mothers are devoted to their young and ______ them with love and discipline.
A. mind
B. watch
C. help
D. tend
单项选择题
I'd just as soon you ______ those important papers with you.
A. don't take
B. didn't take
C. hadn't taken
D. were not taking
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