单选题 No one can______the plan from being carried out.

单选题 It rained for two weeks on end, completely ______ our holiday.

单选题 High blood pressure is a factor that should often be______.

单选题 She turned up the driveway, only______ her way blocked.

单选题 Studying shouldn't______all of a child's leisure hours.

单选题 Sometimes it is hard to______others' requests，but we have to learn how to do it. 1

单选题 The question______he should accept the offer or not troubled him greatly.

单选题 Bacteria can be carried on the hands and clothing and______from patient to patient as a physician attends one after another.