You can’t be ______ when you camp _____ an high altitude, where the air is thin.
With the help of the teachers and classmates, the boy worked hard and finally caught up with his classmates. Now he is _______ all the others.
— When will the new bridge be completed? — It is said that it _______ by the end of this year.
At the beginning of the new term, the teacher asked several students to help _______ the new books to the students in the class.
The fire was so strong that the firefighters couldn’t get it under control, so some soldiers were _______ to help put out the fire.
—There is a hole in your bag? —I know. I’m going to have it __________.