--- Excuse me, could you tell me where ______ in the group-buying?--- Sure, sir. You can try www.taobao.com.
There is _______ bridge in the old town.
Students need at least eight hours to sleep, or they are_______ in class.
He _______ be a history teacher.
Sometimes our hobbies can _______ schoolwork .
Last year he had an opportunity _______ in Oxford University, but he gave it up.