He is quite strange, for everything he does is opposite to ______ is considered normal behavior.
| A．whether | B．that | C．what | D．which |
________ is often the case, we have worked out the production plan.
| A．Which | B．When | C．What | D．As |
The____________house smells as if it hasn't been lived in for years.
| A．little white wooden | B．little wooden white |
| C．white wooden little | D．wooden white little |
The old man, ____________abroad for twenty years, is on the way back to his motherland.
| A．to work | B．working | C．to have worked | D．having worked |
A man is being questioned in relation to the ________ murder last night.
| A．advised | B．attended | C．attempted | D．admitted |
It's ten years since the scientist _______on his life's work of discovering the valuable chemical.
| A．made for | B．set out | C．took off | D．turned up |