-- Why bother? There is too much rubbish here. You’ll never pick it all up.
--- Maybe not. But at least this part of the park cleaner.
| A．was | B．will be | C．had been | D．is |
.I haven’t read_________of his books, but judging from the one I have read I think he is a very promising writer.
| A．any | B．none | C．both | D．either |
In the traffic accident, his father came close to __________.
| A．be killed | B．killing | C．kill | D．being killed |
--- This returned Chinese scholar has become one of the top experts in this field.
--- Yes, I know him very well. He_________in Africa on wild animals for eight years.
| A．has worked | B．had worked |
| C．worked | D．has been working |
.They turned out more than 1,000 washing machines, most of which ________quality.
| A．is good | B．are good | C．is of high | D．are of high |
-- Did you visit the zoo?
--- No, we_______have visited it, but we spent too much time shopping.
| A．shouldn’t | B．can’t | C．could | D．must |