28. The firm invested approximately 60 million dollars in________it says is the world’s largest bottle-bottle recycling plant.
| A．that | B．where | C．what | D．How |
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 |
The terrible shaking of the building woke up all the people _______ were asleep.
| A．who | B．whose | C．which | D．whom |
You should always exercise, ______ it’s only ten minutes every day.
| A．as if | B．even if |
| C．unless | D．while |
____ large number of children have joined the book club and ____ number is increasing.
| A．A, a | B．A, the |
| C．The, the | D．The, a |