（ ） we have all the materials ready, we should begin the new task at once.

We mention the importance of giving up smoking once and again, but hardly ______ it.

（ ） five hundred people are believed to have drowned.

When Mary paid the bill, she was given a _____ for her money.

The color of the skirt does not （ ） that of the coat.

Mary likes classical music _____ her brother likes pop music.

I cannot tell the_____difference between the twins.

I can’t find my keys! Can you help me （ ） them?

Our company’s service is （ ） in nearly 80 countries around the world.

Three of us will go there, and the rest （ ） to stay here.

You needn’t introduce him to me. I’ve met him on several _____.

Patients’bills of rights require that they （ ） informed about their condition and about alternatives for treatment.