do you think of the service here”—“Oh, _________ . We couldn’t have found abetter place.”

he word “PM2.5” _________ appearing in media reports, people pay greater attention to it and seek health tips for smoggy days.

How delicious the coffee is!—That’s right. It will taste ______ with milk.

In North America, most students go to school _____ the school bus.

It took us about ________ to fly to Hong Kong.