8.About 80 percent of the students in our school_____ been working on the program and about two-thirds of the work _____been finished.
| A．have; has | B．has; have, | C．have; have | D．has; has |
Is he the only one of the students who ________ here just now?
| A．is | B．are | C．was | D．were |
We ________ jump to conclusions before we have all the facts.
| A．couldn't | B．mightn't | C．shouldn't | D．mustn't |
It was several years ________ I realized ________ David had lied to me.
| A．when; that | B．that; when |
| C．before; that | D．until; why |
The project will help people understand the many threats to the natural environment ________ endangered plants and animals live.
| A．which | B．when | C．where | D．that |
—How do you think I can make up with Johnson?
—Set aside ________ you disagree and try to find ________ you have in common.
| A．what; what | B．where; what |
| C．what; which | D．where; which |