1 . 咱们去公园锻炼吧，这样我们可以呼吸新鲜空气。
Let’s exercise in the park so that we can ________ ________ some fresh air.

2 . 当人们接近珠穆朗玛峰山顶时，很难呼吸空气。
As people get near the top of Qomolangma, it’s hard to ________ ________air.

3 . 我们戴口罩是为了不吸入有害气体。
We wear masks in order not to________harmful air.

4 . —I am sorry to have ________ your spare time.                    
—That's OK, and I am glad to help you.

A．taken up

B．taken on

C．taken off

D．taken in

5 . Our government ________ to solve them quickly when we had difficulties at the beginning of this year.

A．took action

B．took off

C．took in

D．took place

6 . We are not allowed to ______ the masks when we go out until the disease warning is over.

A．take off

B．take out

C．take in

7 . —When you ________ your mask, make sure not to touch the outside of it in order to avoid the spread of the virus.
—OK . I'll do that.

A．take off

B．take in

C．put up

D．put off

8 . Trees can take ________ carbon dioxide at daytime.

A．off

B．on

C．in

9 . —How about________out for a walk now?
—It sounds great. I really need to________some fresh air right now.

A．going; take in

B．go; lead to

C．going; take away

10 . —It was very cold. Why did you open the window?
—I wanted to ________ more fresh air.

A．pick up

B．get up

C．take in