I don’t know much about computer.—I don’t know, ________. Let’s go and ask for help.

ilding _____ in our school isfor us teachers. Though there’s noise most of day, we still feel happy about it.

ou considered how weak humans areavolcano, hurricane or earthquake

Do you know_______ this dictionary belongs to -Let me see. Oh, it’s_______.

Jenny, Let’s _______ Tom for a radio. —OK.