Our physics teacher told us that light ________ faster than sound.
Tom__________ his father, because they both are cheerful and easygoing.
— I wonder _ _. — I'm afraid we'll be late.
— How is your English study? Not bad. But I_______ learning English grammar.
My car alarm is always______ whenever my neighbor's cat goes under my car.
— I often chat with my friends on the Internet. — You are so smart! Will you please tell me____?