It’s rather cold in most of South China ____ in spring.

1. A.
   on time
2. B.
   at a time
3. C.
   at times
4. D.
   all the time

It’s rather cold in most of South China ____ in spring.

It’s rather cold in most of south China _________ in spring.

It's rather cold outside. If you want to go out, you________ more clothes.

[　　]