Thinking that you know _________ in fact you don’t is a serious mistake.
A. what
B. that
C. when
D. however
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The town _______ I visited last summer is the most beautiful town_______ I know.
A. which…which
B. which…that
C. where…which
D. which…where
The town _____ I lived in my childhood is the most beautiful town _____ I know
A. which…which
B. which…that
C. where…which
D. where…that
He is one of the boys who ______ in the exam
A. have failed
B. has failed
C. fails
D. are failed
He is the only one of the boys who _____ in the exam.
A. have failed
B. has failed
C. fails
D. is failed
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