赞题库-背景图

单项选择题

Though it was late in the night, ______ he continued to work vigorously.

A. but
B. yet
C. and
D. that

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热门试题

单项选择题34().

A.enhance
B.improve
C.have
D.develop

单项选择题33().

A.division
B.difference
C.separation
D.controversy