Finish the sentences with the correct words from the box. Each word can be used only once.1. Stephan always said that he would never use Facebook, but he finally ______ when all of his friends started using it to keep in touch.2. _________ are two babies born at the same time.3. We are ________ out on Sundays.4. The parents who have the only one child may not have children to ________ them when they are old and cannot work.5. I ______! I can’t do this homework. It is too difficult.6. A _______ is a person who can help you if you have problems with your teeth.7. Mary didn’t want to know if her baby would be a boy or a girl before she ________ it.8. You can make a toothache better with _______ .9. There is no sunlight under the sea, but some fish are able to ________ their own light.10.It’s _______ cold today.