This produced a chain reaction, _______ made _______ possible for life to develop.
| A．what; that | B．which; it |
| C．when; that | D．how; it |
_________ you are on holiday,you should enjoy leisure time and take your focus off your work．
| A．Now that | B．Even if | C．If only | D．As though |
By the time I left the concert，my ears_________，with complex feelings filling my heart．
| A．had rung | B．were ringing | C．were to ring | D．rang |
When you have any questions，tum to Jane or Lucy or _________ your group．
| A．whichever | B．whoever | C．whatever | D．wherever |
— What about your self-drive trip yesterday?
— Tiring! The road Was being widened，and we _________ rough ride.
| A．have | B．would have | C．had | D．have had |
Susan’S husband encouraged her to attend the concert，_________ he would take care of the kids．
| A．deciding | B．allowing | C．promising | D．supposing |