.Don’t take too much of the medicine; it does you more harm than good if you ____.
| A．do | B．take | C．like | D．have |
Seeing the happy ______ of students playing basketball there, I can’t help thinking of my school years.
| A．view | B．sign | C．sense | D．Scene |
There are so many viruses on the Internet. If ______ accidentally, the viruses may make your computer break down.
| A．downloading | B．to be downloaded |
| C．downloaded | D．being downloaded |
I _______ to your party, but I was prevented by the heavy rain.
| A．had meant to come | B．was about coming |
| C．have meant to come | D．meant coming |
---Where did you come across your old classmate Jane?
---It was in the supermarket _______ she worked _______ I came across her.
| A．where; when | B．that; when |
| C．that; that | D．where; that |
However, at times this balance in nature is ______, resulting in a number of unforeseen effects.
| A．troubled | B．disturbed | C．confused | D．Puzzled |