—You know. Bob is a little slow ____ understanding, so…— So I have to be patient ______ him.
It is _____to spend a great deal of money on such meaningless and useless things.
____ private cars are bringing us convenience, they may also cause more traffic accidents and pollution.
—I'm afraid I can’t do well in the job interview. Could you give me some advice? —______ Have confidence in yourself.
He ____enough time, otherwise he could have done it better.
---Mary, let’s go to the bookshop this weekend. Will you be ? ---Sorry, but I’m going to visit my uncle in the countryside.