1​. Give the correct form of the words in brackets:
1. Scientists are looking for ways to slow down the rate of greenhouse gas ............ (emit)
2. A healthy body will be able to fight off the illness ..... without the use of medicine. (nature)
3. Many parts of the national road are being .... this year. ( surface)
4. She hits the ball with great ...... (accurate)
5. Some parents may also find their children's behaviour .......  and disrespectful to traditional values.(accept)
6. Did he help you ................ or did anyone force him to do so ? (volunteer)
2. Rewrite the following sentences without changing their original meaning:
1/ Just after solving one problem, I was faced with another.
Scarcely..................................................................
2/ Without his help, we would all have been in worse trouble.
Had it ..................................................................
3/ Working so much will make you tired 
It is ..................................................................
4/ "Have you travelled abroad much?" he asked me
He ..................................................................
5/ Alice and  Charles did not decide to move to  a bigger house until after the birth of their second child.
Only when ..................................................................
6/ You're under no obligation to accept their offer.
You can please ..................................................................
7/ Martin may not be very well but he still manages to enjoy life.
Martin's poor ..................................................................
8/ Mai went to the dentist because she had a toothache.
Because of ..................................................................