kinds of animals in the world died out proved true.
| A．All ; has | B．When some ; have | C．While all ; have | D．That some ; has |
Our success _____whether everyone works hard or not.
| A．lies down | B．leads to | C．depends on | D．results in |
We’d better hurry. Our teacher ________ us.
| A．wait for | B．must wait for | C．must be waiting for | D．has waited for |
The teacher as well as the students _______planting trees.
| A．are | B．is | C．has | D．have |
_______ is known to all, smoking is harm our health.
| A．As, for | B．As, to | C．It, for | D．It, to |
__surprised me most was ___ Mary spoke Chinese just like a native speaker.
| A．That, what | B．Which, that | C．What, that | D．That, that |