Most of us would rather send e-mail as it has _____ of the troubles of sending letters via the post office.
| A．nothing | B．none | C．some | D．either |
— _______ 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 |
My last job lacked variety; I __________ the same things all the time.
| A．did | B．have done | C．was doing | D．have been doing |