单项选择，从A、B、C中选出最佳的答案。
1）I'd like to go with you,______ I'm busy.
A.and B.or C.but
2）----What is the ______ like today?
----Cloudy.
A.sky B.air C.weather
3）----What's the weather going to be like next week?
----It's going to be______.
A.wet B.dark C.long
4）______is spoken the most widely in the world.
A.Chinese B.English C.French