Students here often do physics experiments _____small groups．（ ）
A．byB．inC．forD．at
______ this past three years，which teachers will you miss most？
Mr Jiang．He's helped me a lot．（ ）
A．Looking back atB．Looking for
C．Looking throughD．Looking after
Are we going to have a sports meeting on Friday，Li Ping？
No，it will be ______ till next week because of the bad weather．（ ）
A．put outB．put onC．put awayD．put off
Which country has the ______ population in the world？
China．It's a little ______ than that of India．（ ）
A．most，mostB．biggest，bigger
C．more，mostD．bigger，bigger
Do you think we should share our problems with our parents？
Sure! ______ we talk to them，we will feel worse．（ ）
A．If．B．Although．C．Because．D．Unless
I haven't find the book report of Journey to the West．It's so difficult．
You should hurry up．The report is due ______ three days．（ ）
A．inB．forC．onD．at