Why does take Tom an hour to get home?— I don’t know. Maybe the traffic is heavy.

What a nice MP5! Whose is it? — It’s . My father bought me last week.

It is demanded that the letter ___by the end of this week , dad !—-I’ll do it immediately .

This is the first time that Iface to face with the president.

Edison who invented light had _________ knowledge of science.