What she spends a month at university___________ no more than 500 yuan.
| A．adds up | B．adds up to | C．adds to | D．adds that |
If a healthy environment is gone, ________ everything that our life depends on.
| A．so is | B．nor is |
| C．so does | D．nor does |
—Under no circumstances ________ the door to the Data Centre unlocked.
—I promise I'll be more careful in future.
| A．you need to leave | B．should you leave |
| C．need you leave | D．you should leave |
The drug used to treat this disease causes bad side effects, some of which ________ deadly.
| A．is | B．are |
| C．was | D．were |
．No sooner ________ down on bed ________ the telephone rang.
| A．had he lain; than | B．had he lied; when |
| C．did he lie; than | D．had he laid; before |
________ about wild plants that they decided to make a trip to Madagascar for further research.
| A．So curious the couple were |
| B．So curious were the couple |
| C．How curious the couple were |
| D．The couple were such curious |