___________ will the rain last It has rained for a week.—I have no idea. There is no sign of an end.

keep wasting so much energy, ________are that our oil wells will dry up and the environment will be destroyed.

What _______ honest boy! And he is ________best student of all.

Some researches have proved that water quality ____ due to too many dams and pumps in some areas.

How was your examination?—It wasn’t very difficult,but it was__________long.