— Tom, did Mr. Li join you in your discussion? — No, he__, but he happened to have fallen ill.
Though it is the first time they have met, they talked as if they _____ friends for many years.
A clean environment can help the city bid for the Olympics, which ______ will promote its economic development.
It’s quite _____ of beginners to forget to use an article before a noun.
Qingdao is _____ most beautiful coastal city and I think I’ll go there for _____ second time.
—How do you find your new pen?—Wow, _____. It’s really worth the money I paid.