In the face of all these difficulties, we’re not discouraged and________good spirits. [ ]

You are not ____the books out of the library.

Chinese students find it difficult to understandnative speakers when in London.—Exactly, ______ they’ve learned a lot about grammarand known many words.

I think these materials may be of ___________ to your study.

Beijing has improved a lot these years. —-_______ and ________.