Generally speaking, when ____ according to the directions, the drug has no side effect.
taking B. taken C. to take D. to be taken
--- Did you arrive at the stadium early yesterday afternoon?
--- Yes. It was not yet 2 o’clockI got there.
| A．that | B．before |
| C．until | D．when |
You should make it a rule to leave things _______ you can find them again.
| A．when | B．where |
| C．in which | D．there |
For many cities in China, there is no room to spread out further, _______ Yangzhou is an example.
| A．for which | B．in which |
| C．of which | D．from which |
The artist made up his mind to devote all he could his English before going abroad.
| A．improve | B．to improve |
| C．to improving | D．improving |
A new ________ bus service to Yangzhou-taizhou Airport started to operate two months ago.
| A．normal | B．usual |
| C．regular | D．common |