How much did the company donate to build the school library?— About three ______ yuan．

I really found it difficult to read, for his eyesight was beginning to________.

I plan to go to Beijing _____ plane. [ ]

It was not until the entrance exams were in sight that that I had so many books to cover and so many exercises to finish.

Mum, will you buy me the new iPad after the Entrance Examination?— I’m afraid I ________, dear. We are short of money now.