Sam’s parents workers in that hotel.
A. is B. am C. are
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