Those black clouds are a sure _____ that it’s going to rain.
| A．thing | B．mark |
| C．sign | D．one |
On almost all the buses in our city, there are seats ______ reserved for disabled and elderly passengers.
| A．particularly | B．in particular | C．especially | D．specially |
We’d better hurry up. The exhibition hall is a bit far from ______ we are now.
| A．what | B．which | C．that | D．where |
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 |