You'll get better grades ________ you follow the teachers'advice．（ ）
| A． |
if |
B． |
until |
C． |
though |
D． |
while |
Have you ever climbed Mount Tai，Carol？
Yes．I ______ in Taian for a week last year and reached the top of it twice．（ ）
A．had stayedB．stay
C．stayedD．have stayed
More chances _____ for students to learn from each other if working in groups．（ ）
A．provideB．are provided
C．providedD．will provide
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