I have got a backache.— That’s not surprising. You ______ in front of thatcomputer too long.

des of the Iran nuclear negotiation reached akey point, the result of ________ would have a great influence on the world peace.

I remembered________ the door before I left the officebut forgot to turn off the lights.

Mum, can you give me some advice on how to behave myself at the table— Well, I do have some advice. , please keep quiet while eating.

There is a new problem involved in the popularity of private cars_____road conditions need _____. [ ]