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A.to require B.required C.requiring D.are required 【查看更多】

 

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Textbooks___to come in time.  
[     ]
A. require    
B. are required  
C. required    
D. are requiring

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Text books ________ to come out in time.

[　　]

A．require
B．required
C．a(chǎn)re required
D．a(chǎn)re requiring

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Text books ________ to come out in time.

[　　]

A．require
B．required
C．a(chǎn)re required
D．a(chǎn)re requiring

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At the entrance all passengers _____ to show their tickets.

A. required       B. are required       C. require        D. are requiring

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從所給的四個(gè)選項(xiàng)中選擇最佳答案

Text books ______ to come in time．　　　

[　　]

A．require　　　B．required　　　C．are required　　　D．are requiring

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