— What is the man, actually?—I don’t know for sure. But I think he can be _______ but a policeman.
Our teacher insisted that the key words worth paying attention _______ before class.
With some technical problems to be solved, it may be a while _______ the system is put into use.
That is the only way we can imagine _______ the overuse of water in students’ bathrooms.
A great deal of advanced science and technology has been _______ since China carried out the reform and opening policy.
—Have you heard about Apple iPhone 4? —Sure.It is very hot these days.I’m thinking about getting _______.