With the word “PM2.5” ____ appearing in media reports, people pay greater attention to it and seek health tips for smoggy days.
| A．constantly | B．instantly | C．roughly | D．firmly |
Many children， ______ parents are away working in big cities，are taken good care of in the village.
| A．their | B．whose | C．of them | D．with whom |
____ parents say and do has a life-long effect on their children.
| A．That | B．Which | C．What | D．As |
—She looks very happy. She ______ have passed the exam.
—I guess so. It’s not difficult after all.
| A．should | B．could | C．must | D．might |
____ he had not hurt his leg, John would have won the race.
| A．If | B．Since | C．Though | D．When |
—I saw Jane and her boyfriend in the park at eight yesterday evening.
—Impossible. She TV with me in my home then.
| A．watched | B．had watched | C．would watch | D．was watching |