All passengers _____go through safety check before they take a plane．（ ）
| A． |
can |
B． |
may |
C． |
must |
D． |
ought |
Rock music ______ sound popular with the young，but it's not the favor of the aged people．（ ）
A．mustB．needC．shouldD．may
Don't _____ too late，you will feel tired in class．
I won't，Mum．（ ）
A．call upB．wake upC．stay upD．get up
We all like Lucy as she is always thinking _____of others than herself．（ ）
A．lessB．much moreC．muchD．better
How do you like your new school，Kate？
It is very clean and beautiful _____it is a bit small．（ ）
A．ifB．sinceC．unlessD．although
Can you play the guitar？
Sorry，I can't．____ I can sing some English songs．（ ）
A．AndB．ButC．OrD．For