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C3班 21暑 L17课文练习 + 阅读类练习

亲~,请留下您宝贵的想法,非常感谢您的参与!
二、单选题 (每题1分,共15 分)
Even the top students in our class cant work out this problem, so it___ be very difficult. 
A. may 
B. must 
C. can 
D. need 
Excuse me. ___ you please pass me that cup?     
A. Do    
B. Should    
C. Would    
D. Must
If you want to be a polite guest,you shouldnt .
A. ask how much the hosts furniture costs
B. bring some gifts to your host
C. say anything nice about the hosts room
D. come at the right time
【小题6】
A. bird
B. birds
C. birds
D. birds