—You see, I’m poor in maths, you are not good at English, and... — That’s ____ we should help each other.
Bob is in a hopeless situation, ______ we will keep a very close eye on.
In the past decades, sea ice ______ in the Arctic as a result of global warming.
I know you don’t like her, but try not to make it so ______.
Schools in the north tend to be better equipped, ______ those in the south are relatively poor.
— Excuse me, can you spare me a few minutes?—Sorry, I haven’t ______ time to talk to you just now. I have to leave early to catch ______ 4:30 train.