—Will you answer the telephone? It        your mother.
—Sorry. I        . I’m very busy.

—Do you have any plans for this weekend?
—I’m not sure. I         go climbing Mount Yuntai.

People         breathe(呼吸) when they are under water.

—Dad, must we wait until(直到) the light becomes green?
—Yes, I’m afraid we        . That’s the traffic rule(交通规则).

—        I swim here?
—I’m sorry. Children          swim alone(单独地) here.

When winter comes,         spring be far behind?(冬天来了，春天还会远吗？)

There’s only one day left(剩下). You         finish your school work by tomorrow(明天以前).

—       you use microblog(微博) to post messages?
—Sorry, I        .

—Mum,         I go out to play?
—Yes, you can. But you must finish your homework first.

—What         your brother        ?
—He can do kung fu.