Waste paper shouldn’t _____ everywhere. It’s our duty to keep our classroom clean.
A. be thrown B. throw C. is thrown
In ancient times, dogs were mainly ______helping people hunt( 打猎) .Now they are more useful-they can help the blinds, search for the bad eggs,...
A. bad for B. used to C. used for D. good at
—There are 60 students in my class and 44 of them use weibo very often.
—44? That means about_______of your classmates are weibo users, right?
A. half B. one third C. two thirds D. three quarters
—______did Prince William's wedding（婚礼） last?
—It lasted for about 5 hours.
A. How far b. How long C. How soon D. How often
When you read, don't________every new word in the dictionary. Try to guess its meaning.
A. look up B. work out C. make up D. give up
Zhu Zhiwen’s never been to Hongkong, _______?
A. is he B. isn't he C. has he D. hasn't he
