用正确的介词(介词词组)完成句子

Don't go swimming ________ the river. It's dangerous.

用正确的介词(介词词组)完成句子

Look at the boats ________ the river.

用正确的介词(介词词组)完成句子

There are many cars and buses ________ the bridge.

用正确的介词(介词词组)完成句子

Can you see three planes flying ________ the sky?

用正确的介词(介词词组)完成句子

Two boats are going ________ the bridge.

用正确的介词(介词词组)完成句子

There is a bus stop ________ our school.

用正确的介词(介词词组)完成句子

Li Lei sits ________ my left, and I am ________ his right. We are ________ ________ each other.

用正确的介词(介词词组)完成句子

The hospital is behind the post office. So we say the post office is ________ ________ ________ the hospital.

完成句子

－Where's Seoul?

－It's in ________.

完成句子

Lin Tao is from ________. He's ________. He speaks ________. He's learning English. He speaks a little ________.