---What is your mother doing? --- _________cooking dinner. A.she is B.He is C.She is
()This house very old. A. is B. are C. have
()I want to London. A. visit B. visiting C. visits
()It is a big round eye. A. like B. likes C. liking
()What it? A. does B. is C. are
()Look this book. A. of B. at C. in