— How nice the building is! What is it for?
— It ______ be a hotel. But I’m not sure.
A. must B. mustn’t C. can’t D. may
The sentence structure of “The bird is singing happily.” is ______.
A. S+V+DO+OC B. S+V C. S+V+IO+DO D. S+V+P
The doctor advised Mr. Chen ______ too much meat to lose some weight.
A. to eat B. doesn’t eat
C. not eat D. not to eat
All the villagers were sleeping in their houses ______ the mudslides(泥石流) hit the village.
A. when B. after C. so D. while
The excited woman ______ quickly when she saw her son come back safely.
A. wrote down B. calmed down
C. broke down D.came down
— Why are wetlands so important to wildlife?
— Because it can ______ them with food and cover.
A. practice B. provide C. prepare D. prevent
