William suggested _____ a party for Elizabeth who was going to retire soon.

I certainly didn’t appreciate （ ） when I made mistakes.

Such a skilled tennis player knows how to take_____of his opponent’s (对手) chief weakness.

Fast food doesn’t seem like a good idea, for it is （ ）.

Do you mean this is the_____decision you have made after thinking for hours?

In the experiment we kept a watchful eye （ ） the developments and recorded every detail.

（ ） weather may be too hot to the tourists.

We arranged to meet at the station but she did not （ ）.

I left for the office earlier than usual this morning （ ） traffic jam.

The football player is hoping to（ ）to another team soon．

The chemical factory was torn down （ ） protecting the environment.

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