Plastics is a kind of （ ） which is widely used in industry.

There was a heavy fog this morning, so none of the planes could _____.

I don’t know whether he is still （ ） in collecting coins. He used to be, but that was several years ago.

No one should blind himself （ ） the well-known fact.

You needn’t introduce him to me. I’ve met him on several _____.

I cannot tell the_____difference between the twins.

The most important is not_____ you do, but_____ you do it.

She is very （ ） to his ugly appearance.

It is four years since John （ ） school.

It is her beautiful eyes （ ） attract most of the fans.

Physics （ ）my favorite subject when I studied in the university．

（ ） weather may be too hot to the tourists.