I often think of those occasions ______ we had a happy time together.
| A．which | B．when |
| C．on which | D．Both B and C |
--We don’t think we’ll be able to go mountain-climbing tomorrow.
--______ the weather turns out fine?
| A．How come | B．What if |
| C．How about | D．Why not |
I often visit my parents, who live in the countryside whenever ____.
| A．I am convenient |
| B．it will be convenient to me |
| C．I will be convenient |
| D．it is convenient to me |
It surprised us all ______ good manners the monitor had.
| A．that | B．which | C．what | D．how |
Having compared with the other design, I found this one was ______ that one.
| A．more superior to | B．far superior to |
| C．far superior than | D．more superior than |
I have no ______ to the plan, so long as it will not cost too much.
| A．refusal | B．comment | C．idea | D．objection |