单项选择题

Digging the garden with a spade is a very（）task. I am exhausted after such two-hour’s work.

A. industrious
B. manual
C. conscientious
D. laborious

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单项选择题

（）this coming Thursday, it will be too late to enroll of the course.

A. As of
B. As for
C. As to
D. As on

单项选择题

It is very plain that such a life as this is far more（）to health than that of the man who can afford little leisure for necessary rest in the course of the day．

A．conductive
B．constructive
C．conciliate
D．conducive

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