It was not until Tom took off his dark glasses that I _____ him.
| A．recognized | B．knew | C．discovered | D．realized |
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 |
—What do you think of the news in today's newspaper?
—We shouldn't ________ the trouble of helping others only because what we do may invite trouble.
| A．knock off | B．take off |
| C．keep off | D．break off |
—I think that every need of the customer should be attended to.
—________.
| A．I'd love to | B．I'm with you on that |
| C．It's my pleasure | D．It's up to you |