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？

管理的目的是为了___________。

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.

计算机网络建立的主要目的是实现计算机资源的共享，计算机资源主要指计算机 ________。

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

计算机网络建立的主要目的是实现计算机资源的共享,计算机资源主要指计算机__、__与__。

Hurry up, or you ______ catch the train.

计算机网络建立的主要目的是实现计算机资源的共享。计算机资源主要指计算机________。