--If we don’t do our best to reduce pollution, man’s history won’t last long.
--_________.
| A．It’s OK | B．You are absolutely right |
| C．That’s all right | D．Mind your own business |
I want to use the same tools _______used in your factory a few days ago.
| A．as was | B．which was | C．as were | D．which |
I have two grammars, ______are of great use.
| A．all of which | B．either of which | C．both of that | D．both of which |
That is not the way ______I do it.
| A．/ | B．which | C．for which | D．with which |
He is working hard, ______will make him pass the final exam.
| A．that | B．which | C．for which | D．who |
The reason ______he didn't come was ______he was ill.
| A．why; that | B．that;why | C．for that;that | D．for which;what |