Have you ever seen any trees ________ leaves were black because of the polluted air?
| A．whose | B．that |
| C．which | D．who |
The failure in physics seemed to have completely ______his confidence.
| A．destroyed | B．injured |
| C．shocked | D．attacked |
They have earned lots of money，so I ______believe that the business is a success.
| A．mildly | B．hardly |
| C．actively | D．firmly |
Doctors have said that as many as 50% of patients don't take medicine ________.
| A．like directed | B．to be directed |
| C．as directed | D．so that directed |
________，I will help you with your work.
| A．If I am possible | B．If it possible |
| C．If possible | D．Possible |
With so much noise outside, I couldn’t my work and wondered what was happening.
| A．leave out | B．concentrate on |
| C．look after | D．watch over |