I can hardly work out the answer _____ thisdifficult question.

Kate as well as her friends _____ an interest in studying Chinese. [ ]

Looking up,I saw his eyes_____ on me in curiosity [ ]

is Tommy—Maybe he is in the hospital. He told me that he had sore eyes.

There are some book shelves in the back of our classroom, on which are various magazines and reference books, making reading materials more _____________to the students.