Everyone stood up _____ the hero came into the lecture hall.

. I suggest you buy this one . It is ________ more expensive but it can be used for a longer time .

Great scientists don't ________ graduate from well-known universities. Some didn't even attend school a year in total.

Environment-friendly Olympics requires Beijing to improve its environment, _______ turning it into an ecology-friendly city.

I always look _____ those who never look _____ others, even though they have achieved great achievements. 

The country’s car industry is so strongly protected that foreign cars are        seen there.

I’d like to go with you, ______, my hands are full.

Some people think clowns are only funny for children. _____________ , they can help people forget their problems, at least for a short moment.

You should be more careful,  _______ you might meet with some accident.

--- Jim failed again in the maths examination.
--- Don't scold him too much. _____ , he has tried his best.