What do you think of the report about the airpollution on TV last night—I think the situation is so thatwe should take action to protect the environment.

, but he couldn’t understand the logical connection ofthe two subjects.

He hurried to the airport and got _______ the plane just in time

Were you _______ when you saw that wildanimal

A lot of water _______ in Xian every year. It’s a big problem.