In the rainforest of the Amazon, 50 to 150 plant species ______ every day.
| A．are being destroyed | B．are destroying |
| C．have been destroyed | D．destroyed |
It was ________ Benazir Bhutto, former Pakistan prime minister, was leaving the rally(集会) that the suicide bomb happened, ________ the world felt sorry.
| A．when; for which | B．as; which |
| C．since; for which | D．after; which |
.---Where’s that report?
---I brought it to you ________ you were in Mr. Black’s office yesterday.
| A．if | B．when | C．because | D．before |
Pop music is such an important part of society_______ it has even influenced our language.
| A．as | B．that |
| C．which | D．where |
The research is so designed that once________nothing can be done to change it.
| A．begins | B．having begun |
| C．beginning | D．begun |
As she________the newspaper, Granny________asleep.
| A．read; was falling | B．was reading; fell |
| C．was reading; was falling | D．read; fell |