It is wrong of a student ______ his homework by himself. Copying makes one lazy.

They speak perfect English. How long have they learnt it—_______ they were seven years old.

In fact，most of us would the consequences of stupid decisions taken byothers.

My father ____ a bus to his office until the workershave had his car fixed next week

The two friends _____ on the Internet for three hours, and they would go on till the next morning.