1 . 我到家时我爸妈都没下班。
Mum and Dad were still _________ _________ when I got home.

2 . The physics teacher had a cold last week, but he was still ________. (在工作)

3 . —Most of the wild animals are ________ because of their bad living environment.
—So we must do something to save them.

A．in peace

B．in balance

C．at work

D．in danger

4 . Please do not enter the laboratory while Professor Smith is at ______ work.

A．/

B．a

C．an

D．the

5 . 我爸爸此刻还在工作。
My father is still ________ ________ now.

6 . —Where is Jack? I want to talk to him.
—He is busy. He is still ________ work. He can’t talk with you now.

A．/

B．after

C．at

D．before

7 . Today is Sunday. My father is still ________ ________ (在工作) in the hospital.

8 . Once they find people ________, they decide on suitable ways to help them.

A．on business

B．in need

C．at work

9 . 格林先生仍在工作。
Mr. Green is still _________ _________.