有几道英语选择题,如果可以的话,说明一下选项的原因就更好了!

有几道英语选择题,如果可以的话,说明一下选项的原因就更好了!
1.（ ）help you with your math,will you?
A Let’s B Let me C Let us D Allow
2.Is this the river( )I can swim?
A which B in wich C that D the one
3.Can you lend me the dictionary( )the other day?
A that you bought B you bought it C that you bought it D witch you bought it
4.The world( )is made up with matter
A in that we live B on witch we live C where we live in D we live in
5.His parents were both born( )
A.in the 1970s B at the 1970 C at the 1970s D in the 1970
6.---He has more money but( )friends
---Yes.Sometimes money will never be worth(值……)anything
A less B few C little D fewer
7.Everyone except Tom and John ( )there when the meeting began.
A is B was C are D were