I want to pick apples ____ the weekend. （   ）

A．on

B．in

The young woman has so many dresses, but she doesn’t know ________ every morning.  (    )

A．what to wear

B．how to wear

C．what to put on

Don't look out________ the window. It's dangerous.

A．at

B．of

C．in

句型转换
(1) China is a modern and strong country.（in twenty years）
_________________________________
(2) Do you study hard?（from now on）
_________________________________
(3) She didn’t speak English at the meeting.（before long）
_________________________________

You _________ me Chinese last week. (   )

A．taught

B．teacher

C．teach