Many boys enjoy _______ football, basketball or baseball

－ What does the sign over there read － “No person ________ smoke or carry a lighted cigarette, cigar or pipe in this area”

Which do you think is ________, health or wealth？

29．__________ when you are on the bus or bike．

Which do you think is _________________important, health or wealth?

Either he or I ______to the airport.

Duty is an act or a course of action that people __________you to take by social customs, law or religion.

Duty is an act or a course of action that people ______you to take by social customs, law or religion.

Project ______is an uncertain event or condition that，if it occurs，has a positive or a negative effect on at least one project objective，such as time，cost，scope，or quality．

Hurry up, or you ______ catch the train.

企业取得短期投资时支付的税金、手续费等相关费用，应________。

企业取得短期投资时支付的税金、手续费等相关费用，应__________。