_______ on time, this medicine will be quite effective.
Some people fear that ________ air pollution may bring about changes in _______ weather around the world.
This area experienced. heaviest rainfall in month of May. A. 不填; A. B. a; the C. the; the D. the; a
When his brother was to cross the street, he was knocked down by a truck and badly ____.
Recently, these companies have _____ some workers because of the drop in economy.
.---I’d like to go home now.---Why not stay here for the night ?It is so late now.____ it is raining so hard.