单项选择题
A．The man can speak a foreign language. B．The woman hopes to improve her English. C．The woman knows many different languages. D．The man wishes to visit many more countries.
A．They reveal the seriousness of the problem. B．They indicate how fast the virus spreads. C．They tell us what kind of medicine to take. D．They show our body is fighting the virus.
A．They should make sure their children are always punctual for school. B．They should ensure their children grow up in a healthy environment. C．They should help their children accomplish high-quality work. D．They should see to it that their children have adequate sleep.