—You seem to have known Dr. Ken for a long time.—That’s true. ________ he joined our club years ago.
People are puzzled ________ they read the book.
The soldier was of running away when the enemy attacked.
According to the air traffic rules, you should ________ off your mobile phone before boarding.
Despite the language ________, they soon became good friends.
You’ve ________ the most important word in this sentence.