Tom is so worried about the test that he said he was going to study all night.—-Tell him he should quit _________and get some help.

Jack，please________ the lights to save electricity.

Some of the members demanded to know why they had been keptthe true facts until they reached the present critical stage

doesyour school have the parents’ meeting?— Twice a year.A．How often

Mary as well as her sisters _____ Chinese in China. [ ]