I have bought two ballpens, _______ writes well.
| A．none of them | B．neither of them | C．neither of which | D．none of which |
My study of biology has ___ much of my spare time, ____ it has given me a great deal o enjoyment.
| A．taken off, and | B．taken down, so | C．taken up, but | D．taken away, or |
The doctor will be free ___.
| A．10 minutes later | B．after 10 minutes | C．in 10 minutes | D．10 minutes |
__ is known to everybody, the moon travels round the earth every month.
| A．It | B．As | C．That | D．Which |
---I drove to Zhuhai for the air show last week.---Is that ___ you had a few days off?
| A．why | B．when | C．what | D．where |
What the doctor really doubts is ___ my mother will recover from the serious disease soon.
| A．when | B．how | C．whether | D．why |