—You don’t seem to be quite yourself today. What’s wrong? —Oh, I’m suffering from a cold. Nothing serious, _____. 

--- In what way will you use your portable computer?--- I’ll use it _____ for giving lectures at home and abroad. 

We must be off _____. It’s eight o’clock already.

The boy knocked down by the car stood up all by himself , _____unhurt.

It was foolish of you to take a taxi ______you could walk there in five minutes.