You didn’t wait for Mr. Black last night, did you——No, but we ____. He didn’t return home at all.

Only _____ people can have a good understanding of the lecture given by the scientist.

Mr. Wilson, can I ask you some questions about your speech–Certainly, feel ________to ask me.

The suggestion they all objected to________to be effective finally

Chemicals in the body ______our food _____into useful things