– Physics _____ more difficult than Chinese, do you think so? -- Yes, I think so. A. is B. are C. has
The girl ____ red is my sister.
—How old is Tom? —He is ____.
—Do you have a small mouth? —No, I don’t. I have a wide ____.
—____ your sister know Lucy? —No, she ____.
—____ is your schoolbag? —It’s green.