The children，________ had played the whole day long，were worn out.
| A．all of what | B．all of which |
| C．all of them | D．all of whom |
Correct the errors in his composition, _______.
| A．if possible | B．if any | C．if ever | D．if necessary |
. ---What a hit! Do you agree?
---_________.
| A．Yes, it is really disappointing | B．No, I like it |
| C．No, it's worth seeing it | D．Yes, it's really exciting |
We got to the top of a mountain _________ we can see the whole city.
| A．at where | B．from there | C．from where | D．there |
He rarely switches on to hear any of the classical music he claims to be so keen ____.
| A．to | B．on | C．by | D．into |
______ exceptionally heavily might railway services be temporarily dislocated (扰乱).
| A．If only it snowed | B．Only in case it snows | C．Only were it to snow | D．Only when snow |