Can you tell me the        difference between the words “require” and “request” ? I sometimes get puzzled by their meanings.

I’m ____ at sums that Joan, but better at history.

     students are required to take the boat race.

---How do you find the furniture I bought? --- ______________. But ___________ what you bought with the one we had I don’t think it worth the money.

So far we have done a lot to build a low—carbon economy, but it is ____ideal. We have to work still harder.