——Someone called you just now.——I know. But I was busy at that moment. When I called back, there was no .
—I think ________ good to study with a group. —I agree with you.Group work makes us study better.
He suggested ________ shopping.
Have you decided when ________ for London ?
—Can you tell me ________ English at home? —Listen to the English program and do a lot of reading.
First, don't ________ make mistakes.