单项选择题

(It is) (in) his spare time (when) Robert teaches (himself) English and Japanese.

A．A
B．B
C．C
D．D
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单项选择题
(Let’’s not) waste time on (matters of no important). We have other (vital) problems to (deal with).
A．A
B．B
C．C
D．D
问答题
The agriculture revolution in the nineteenth century involved two things; the invention of labor-saving machinery and the development of scientific agriculture.
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