It is three years_____ his father smoked . A when B after C since D while
---Helen, will you be at the party tonight? ---Yes, but I have so much homework to do that I really__________.
Some people like drinking coffee, for it has________effects.
After the trainer was sure that the whale could look after itself, he __________it into the sea.
---English has a large vocabulary, doesn’t it? Yes. more words and expressions and you will find it easier to read and communicate.
________seems to be a strong competition in China for senior high students to enter universities does exist in other countries as well.