— Have you had your breakfast yet?—Yes. Mom _____ it for me.
When I was a child, my grandmother _____ me interesting stories. A. used to tell B. is used to telling C. use to tell
Waste paper shouldn’t _____ everywhere. It’s our duty to keep our classroom clean. A. be thrown B. throw C. is thrown
– Whose notebook is this? -- It _____ Tom. I saw he used it just now. A. must belong to B. can’t belong to C. might be belonged to
– It _____ hard outside. You have to stay at home. A. rain B. is raining C. rained
– Physics _____ more difficult than Chinese, do you think so? -- Yes, I think so. A. is B. are C. has