His mother ___ in a hospital, but she ____ these days.A. works, isn’t workingB. is working, worksC. is work, doesn’t work
— These books are not yours, are they?—________. I am looking for mine.
—Did the book provide the information you need? —Yes. But ________ it, I had to read the whole book.
—Would you like to go hiking with us this Sunday? —Sure, _______ I am busy.
She was really sad becauseshe was told she ________give up volleyball.
— ________ have you become so good at English this term ?—By studying grammar and reading English novels.