Make sure the gas is turned off after a bath, which would _______ cause danger. 
| A．somehow | B．meanwhile | C．otherwise | D．furthermore |
At the meeting they discussed three different _____ to the study of maths.
| A．approaches | B．means | C．methods | D．ways |
The bald eagle_____ the United States.
| A．relates | B．takes the place of | C．represents | D．stand for |
It was difficult to guess what her _____ to the news would be.
| A．impression | B．comment | C．reaction | D．opinion |
—How do you _____ to her unkindly behavior? —Only silence.
Which of the following is wrong?
| A．react | B．answer | C．reply | D．respond |
If his parents are convinced ______ the fact that his son always focuses his mind _______his study.
| A．of; on | B．of; at | C．by; to | D．on; at |