I saw him _______ a book in the room just now.A. readsB. readingC. to read
“Underground” is the only word in the English language _______ begins and ends with the letters “und”.
People should ______ from ______ down the trees to protect the earth.
—Mr. Li’s never been to Shanghai, has he? — . He went there to attend a meeting last week.
—Wechat is a kind of fast, convenient and fashionable ______method. It can be used in our mobile phone. —What’s more, we can use it for free.
— Can you spare time to come to our Thanksgiving party? — Well, I don’t know ________