What do you think of living______ in a big flat?—I think I will feel______. [ ]

Has your friend completed his design? – Not yet. He ________ on it last night.

Many people agree that_______ knowledge of English is a must in ______international trade today.

The football team arrived ______ the airport ______ the morning _______ Tuesday. [ ]

Since time began, it seems, people have been putting off______they______have done today, scolding themselves in the meantime．