Scientists say it may be five or six years ______ it is possible to test this medicine on human patients.
We’d better hurry up. The exhibition hall is a bit far from ______ we are now.
The old man lives alone on an island, and his home is not accessible ______ by boat.
. Do you think it ______ to attend the summer training courses run by the Sunday school?
Jim is old enough to look after the pet dog ______.
I never dreamed of ______ such a big crowd here.