________ surprises us most is that she doesn’t even know _______ the difference between the two opinions lies.

We’ll climb the mountain _______ the weather is bad this weekend.

Leave your key with a neighbor you lock yourself out one day

n problems such as energy crisis, pollution and populationexplosion_________, people are asked to share the bitterness and endure thehardship with all the whole nation of the times．

One advantage of owning your own car isyou can go anywhere at any time you like