________ work has been done to improve the people’s living standard.
Mr. Blake is very popular because of his good of humor.
—Was it last summeryou luckily got an opportunity to spend your holiday in Hawaii ? —Not me . John was the lucky dog .
---Must I fill in the form? --No, _______.
There is a great danger if the driver has been drinking alcohol or taking drugs, or _____ by speeding or breaking down traffic laws.
---What’s wrong with you, Mr. Keller? --- I’ve had a very bad headache for two days. At first, I ______ I caught a cold, but the medicine ______.