Those species inadaptable to changing conditions may __________.
| A．die of |
| B．die down |
| C．die away |
| D．die out |
—His parents try to do everything for him．
—That’s they are mistaken．
| A．where | B．when | C．how | D．wherever |
—is it that is troubling Mary?
—Working out the maths problem．
| A．What | B．How | C．Why | D．Which |
—The fishermen should have been warned of the bad weather．
—，but they didn’t listen to it．
| A．So were they | B．Yes．they were |
| C．So should they | D．Yes．they should |
I received his mother’s telephone call at eleven． that he was badly hurt in an accident yesterday．
| A．Then did I know | B．Only then I knew |
| C．Only then did I know | D．Only then knew I |
We should be able to do the job for you quickly， you give us all the necessary information．
| A．as if | B．or else | C．provided that | D．in case |