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第1题

I remember _______ to help us if we ever got into trouble. A.once offering B.him once offering C.him to offer D.to o
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第2题

It may be safely ____ that there is no animal life on Mars. A.assembled B.assisted C.assumed D.assigned
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第3题

No attempt has been made to ____ a complete bibliography of these writings. A.provide B.secure C.ensure D.inform
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第4题

The unemployment figures are not necessarily ____ to the rise in price. A.regulated B.related C.relaid D.released
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