Now more and more people are trying _____ using plastic bags, wooden chopsticks and napkins to protect the environment.
A. stop B. to stop C. stopping D. Stopped
Yu Min _____ in the physics field for many years. He is called the Father of Hydrogen Bomb (氢弹之父). He in the winner of the award for Supreme Science and Technology of China,
A. has worked B. works
C. worked D. had worked
Neither the children nor their mother _____ scary movies when Mr White is away.
A. enjoy B. enjoyed C. enjoys D. enjoying
--- Lily, whose backpack is this?
--- I think it _____ be Peter’s. Look! His name is on it.
A. can B. should C. must D. Could
The group of people _____ the hotel after walking for 6 hours. They needed to have a rest.
A. arrived at B. arrived in C. got D. Reach
The little boy could _____ speak when he was 2 years old, but now he can sing wonderfully.
A. hard B. hardly C. never D. Ever
