—Would 13：00 be convenient?
—________， but I'll have to check my schedule for sure.
| A．It won't do | B．It should be fine |
| C．That's the deal | D．It's up to you |
Plants grow best__________it is warm and wet.
| A．which | B．in which | C．where | D．that |
__________ you go，you should bear the motherland in mind.
| A．Where | B．Whenever |
| C．However | D．Wherever |
_________，so he didn’t come to school last week.
| A．Though he was ill | B．Being ill |
| C．Having been ill | D．He was ill |
In my opinion，his suggestion__________right or not，should be considered.
| A．if | B．which | C．when | D．whether |
It was quite a long time__________I made it out what had happened.
| A．after | B．before | C．when | D．since |