Many kinds of animals are ______. We must do something to save them.
A. on holiday B. in danger C. on show
I often saw the boysin the river.
| A．swam | B．swimming | C．to swim | D．swim |
This math question is too difficult. Can you help me?
| A．work on it | B．work out it | C．work it out | D．work for it |
Mr. Black asks the kids ________ in the river, because it’s too dangerous.
| A．swim | B． to swim | C．not to swim | D．swims |
He is very angry with his mother, because his mother alwayshim with the best student.
| A．compares | B．complains | C．tells | D．makes |
—What’s wrong?
—I can’t do my homework now. Imy homework in the classroom this morning.
| A．leave | B．forget | C．forgot | D．left |