Chen Wei isn't at school today ________ he is taking a robot competition in Shanghai．（ ）
| A． |
so |
B． |
because |
C． |
before |
D． |
if |
Why not go out for dinner？My treat this time．
．But I′m busy preparing for an interview．（ ）
A．Not at allB．In your dreams
C．Sounds greatD．Don't mention it
In China， many students feel stressed because of too much homework．
Don′t worry．Our government has realized this problem， I′m sure there be good news for them soon．（ ）
A．canB．mustC．shouldD．need
Sandy seldom goes out at weekends because reading most of her free time．（ ）
A．takes upB．takes onC．takes offD．takes out
Father is too tired today．Don't call him it is necessary．（ ）
A．ifB．unlessC．whenD．whether
I will volunteer for a two﹣day home stay for an exchange student from the UK．I consider it a good chance to show Chinese food our kindness．（ ）
A．as well asB．so well asC．as good asD．so good as