Open the window and let ____ some fresh air .

We should open the window often to let ( ) in . ( ) A: fresh air B: fresh airs C: a fresh air D: fresh the air

打开窗子给房间通风。 A: Open the window and air the room. B: Close the window and air the room.

中国大学MOOC: Which of the following expressions refers to “a cinema in the open air”?

（） in what position the engine stops there will always be at least one of the cylinders with its starting air valve open to admit compressed air to start the engine.

Please open the window, and let the fresh air _______. A: in B: out C: from D: off

People eat dumplings and new-year cakes(). A: in the open air B: in their houses C: in the parks D: near their houses

The room has a (n) ________ smell. It is advisable to open the window and air it for a while. A: defensive B: stimulating C: refreshing D: offensive

“A souk is an open-air marketplace in an Arab country.” In the sentence, the word “souk” means _____.

Do you mind _____ I open the window? There's no fresh air! A: what B: if C: why D: how E: when