As we all know，__________ Siberian tiger is __________ endangered species.
| A．/；an |
| B．the; the |
| C．a; / |
| D．the; an |
---What happened to the young trees we planted last week?
---The trees ________well，but I didn't water them.
| A．might grow |
| B．needn't have grown |
| C．would have grown |
| D．would grow |
---Mum，would you please buy me an MP5 player?
---If you can help do some housework the whole vacation，you ________have one as a reward.
| A．must |
| B．need |
| C．would |
| D．shall |
________a little earlier this morning！I missed the bus by only a minute and waited half an hour for another.
| A．If I had got up |
| B．If I got up |
| C．If only I had got up |
| D．If only I got up |
Do you know Herbie？I'm always running into him；he________live nearby.
| A．would |
| B．need |
| C．must |
| D．should |
---I didn't apologize to him for being unable to inform him of the change in the plan.
---But you________.
| A．ought to have |
| B．have to |
| C．should |
| D．must have |