It was never clear ____ the man hadn"t reported the accident sooner. [

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It was never clear ____  the man hadn"t reported the accident sooner.     [     ]
A. that
B. how
C. when
D. why

答案

举一反三

It is uncertain ____ side effect the medicine will bring about,  although about two thousand
patients have taken it.     [     ]
A. that
B. what
C. how
D. whether

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It has been proved _____ eating vegetables in childhood helps to protect you against serious illnesses in
latter life.     [     ]
A. if
B. because
C. when
D. that

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_____  was most important to her, she told me, was her family.       [     ]
A. It
B. This
C. What
D. As

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_____ made the school proud was ____ over 90% of the   students had been admitted to key
universities.   [     ]
A. What; because
B. What; that
C. That; what
D. That; because

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____ we"ll go travelling on May Day depends on the weather.
A. If
B. What
C. Whether
D. Where

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