If you get into difficulties, don’t hesitate to （ ） help.

If I had remembered （ ） the window, the thief would not have got in.

We consider_____the instrument be adjusted each time it is use

He （ ） yesterday morning, and would stay for three days.

Smoking is not good （ ） you because it can affect your health.

You _____ all those calculations! We have a computer to do this sort of things.

He learned how to use sign language to _____ with deaf customers.

You’ve never told me why you didn’t come to my birthday party， _____?

It is （ ） impossible to work with this noise around.

Her suggestion （ ） the class meeting be put off was turned down.

The authority urged the rebellious party to _____ their arms and come back to the negotiating table.

（ ） when she started complaining.