We don't know the love of our parents _______ we become parents ourselves one day．（ ）
| A． |
until |
B． |
after |
C． |
when |
D． |
since |
This museum ______ here for over 80years．It ______ one of the oldest buildings in this city．（ ）
A．is； wasB．had been； is
C．was； has beenD．has been； is
Xiandao Lake in Yangxin is the famous place ______ we'll visit next week．（ ）
A．thatB．whoC．whereD．whom
Sorry，Miss Liu．I left my workbook at home．Must I hand it in today？
No，you ______．You ______ bring it here tomorrow．（ ）
A．mustn't； shouldB．can't；must
C．mustn't；mayD．needn't；can
The twins look exactly the same．______ of them are in my class．（ ）
A．EachB．BothC．EitherD．None
I don't think students should use mobile phones at school．
______．They really have a bad influence on our study．（ ）
A．I agree with youB．Not at all
C．No problemD．It's my pleasure