Most environmental problems exist because adequate measures for preventing them ____in the past.
| A．not being taken | B．didn’t take |
| C．were not taken | D．haven’t taken |
The old man lives alone on an island, and his home is not accessible ______ by boat.
| A．rather than | B．or rather | C．other than | D．no less than |
. Do you think it ______ to attend the summer training courses run by the Sunday school?
| A．worth | B．worthy | C．worthwhile | D．worthy of |
Jim is old enough to look after the pet dog ______.
| A．correctly | B．rightly | C．properly | D．accurately |
I never dreamed of ______ such a big crowd here.
| A．there being | B．there to be | C．there having | D．there to have |
Many famous writers are reported ______ long before they started reading themselves.
| A．to have read to | B．to have been read to |
| C．having been read to | D．being read to |