英语单选题（请详细解释）
1.Uncle Wang is going to Beijing.He is packing his suitcase____clothes.
A.on B.with C.of D.in
2.----Can I help you?
----I want____,please.
A.two socks B.two pair of socks.C.two pairs of socks D.two pairs of sock
3._______.The baby is sleeping.
A.Not tale B.Not talking C.Don't talk D.Don't talking
4.We can go to school______.
A.on bus B.take a bus C.on a bike D.by a car
5.This pair of glasses______more money.
A.needs B.need C.are D.cost