Studentsremainintheirseatsunti

Students ______ remain in their seats until all the exam papers have been collected.

A．must

B．shall

C．may

D．can

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相关试题

( ) 29. In such dry weather, the flowers will have to be watered if they _________.

A．have survived

B．are to survive

C．would survive

D．will survive

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( ) 28. Things fall to the ground _______ go up into the air because of gravity.

A．instead of

B．than

C．rather than

D．in place of

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( ) 27. Take _______ half, they’re exactly the same.

A．either

B．any

C．both

D．Neither

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( ) 26. I have been studying computer for several years and I still __________.

A．have

B．do

C．have been

D．Am

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( ) 25. This book is said to be a special one , which _______ many events not found in other history books.

A．writes

B．covers

C．prints

D．Reads

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