. —How’s your tour around the North Lake? Is it beautiful?
—It __________ be, but it is now heavily polluted.
| A．will | B．would |
| C．should | D．must |
—Could you say something about Turkey’s downing of the Russian fighter jet?
—Sorry. It ______ by a group of experts and will be made clear the moment they get the answer.
| A．has been investigated | B．is being investigated |
| C．was investigated | D．was being investigated |
Just as Tu Youyou once commented, “In order to make some achievements and ______ yourself in your field, there are certain things you must do.”
| A．bury | B．promote |
| C．distinguish | D．behave |
With the word PM 2.5 ________ appearing in media reports, people pay greater attention to it and seek health tips for smoggy days.
| A．immediately | B．consequently |
| C．permanently | D．constantly |
Finally, developing teenagers’ critical thinking should be a(n) ______ for education committed to helping students become competent citizens.
| A．motivation | B．inspiration |
| C．priority | D．responsibility |
Young people who have got jobs may realize university lessons can’t be the only preparation for all of the situations ________ appear in the working world.
| A．where | B．when | C．that | D．what |