They gave a(n)________broadcast while the performances were in process on the stage.

People are encouraged to speak openly，but careless words are ________to hurt others’ feelings.

Smoking is one of the ________causes of cancer，killing millions of people each year.

Would it be____ for you to pick me up at four o’clock and take me to the airport?

__________ of furniture have been tested to guarantee good quality.

There are a number of methods to provide ___________ relief from your toothache pain, which can’t cure the problem.

In that school, English is compulsory for all students, but French and Russia are ____ .

Though we spent a lot, we think it _____ because we succeeded in the end. 

My grandfather is always thinking for others. In another word, he is always ________.

——What do you think of the speech given by the CEO from Hong Kong ?
——Excellent, I have never heard ______ one before.