They lost their way in the forest, and _______ made matters worse was that night began to fall.
| A．that | B．it |
| C．what | D．which |
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 |
He is very good at carpentering, though ______.
| A．is very young | B．very young |
| C．he very young | D．he was very young |