In China’s countryside, villagers often have the same family name, but ________ not be closely related.

The authors of computer viruses are geniuses.—— I agree. They can apply their wisdom to other net technology ________ human beings can benefit.

Eric, can you carry the books for me — __________ I am glad to help you.

It_____we had stayed together for several weeks_____ I found we had a lot in common. [ ]

Let’s give Tina some ________, she has failed in math .