the Europeans knew what compass was, the Chinese had put it into practical use.
A. Before long
B. Long since
C. Long ago
D. Long before
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She thought I was talking about her daughter, ______ in fact I was talking about my daughter.
A. because
B. unless
C. while
D. therefore
He hasn’t yet arrived. He may, ______, come later.
A. but
B. if
C. or
D. however
______ the students ______ the teacher knows anything about it.
A. Neither, nor
B. Either, or
C. Both, and
D. Not only, but also
He ran ______ quickly ______ I couldn’t catch up with him.
A. such, that
B. so, that
C. hardly, when
D. no sooner, than
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