We finally bought several books by Shakespeare, ______ is one.
| A．which of them | B．which of whose | C．of which this | D．and of them |
They urged that the library ______ open during the vacation.
| A．must be kept | B．is kept | C．would be kept | D．be kept |
The environmentalists said wild goats’______ on the vast grasslands was a good indication of the better environment.
| A．escape | B．absence | C．attendance | D．appearance |
— _______ I ask you something, if you are not busy?
—Yes, of course you _______.
| A．Should; should | B．Could; can |
| C．Could; could | D．Can; Could |
We should take good care of the elderly, as they are ______ to the sudden change of weather.
| A．sensitive | B．anxious | C．weak | D．positive |
Can you think of some cases______ drivers obviously knew the traffic rules but he didn’t obey them.
| A．why | B．where | C．as | D．while |