单项选择题 Careful surveys have indicated that as many as 50 percent of patient do not take drugs ______ directed.

单项选择题 The boy tiptoed out of the room and headed for the swimming pool without his father's______.

单项选择题 It is time for me to see ______ dinner.

单项选择题 John doesn't believe in ______ medicine; he has some remedies of his own.

单项选择题 The shoemaker can mend whatever______.