The old man enjoys walking ________ the square in the morning. （   ）

A．cross

B．across

C．crossing

D．to across

—What's ____________ the picture? (    )
—A sheep and a bear.

A．on

B．/

C．in

It’s a programme ___ monkeys. （  ）

A．for

B．in

C．about

At________ time, I’m sad to say goodbye to you. (   )

A．same

B．the same

C．difficult

选择合适的介词补全句子。
1. Please turn right ________ (in; at) the first crossroads.
2. The gas station is next ________ (to; with) the grocery.
3. How can she get home ________ (to; from) the supermarket?
4. You’re ________ (on; in) front ________ (of; for) the post office.
5. How can you get ________ (to; for) the restaurant?