where are you going this summer holiday?I _ go to Canada, but I’m not sure.A.can B.may C.must
Listen up, everyone! I have ______ to tell you.
It’s ________ to leave a child alone.
I’ll return the book to the library as soon as I________it .
________ is good for your health.
—Are there any trees on _____ sides of the new street? —Yes, there are.