Recent research has the cause of the disease.
| A．thrown off | B．thrown open | C．thrown out | D．thrown light on |
Attention, please！The plane to London_______ off at 9: 00.
| A．took | B．takes |
| C．was taking | D．has taken |
Every minute of the day is filled _______ urgent matters.
| A．about | B．of | C．with | D．for |
If you can’t _____ a better plan, we have to carry out the present one.
| A．on purpose | B．join in |
| C．go through | D．come up with |
I’d like to know _____ Chinese.
| A．when he began to learn |
| B．when did he begin to learn |
| C．when did he begin learning |
| D．for how long he began learning |
Rather than ______ his own car work, he preferred ______ public transport.
| A．to drive ; to take | B．driving ; taking |
| C．drive ; to take | D．drive ; taking |