Jack wasn’t allowed to go into the sports club ______ he left his membership card at home.

An ant was drinking by a small river when it fell in.It made ______ efforts to reach the side，but made no progress at all.

The doctor is skilled at treating hearttrouble and never accepts any gift from his patients, so he has a very good_______.

Just as a book is often judged ______ by the quality and appearance of its cover, a person is judged immediately by his appearance

Whenever he was asked why he was late for class, he would answer carelessly, always ________ the same thing.[ ]