The math problem is so hard. I really don’t know .
—Do you like watching the talk show? —Yes. It always makes people _______.
—What do you think of the two pairs of trousers? —They don’t fit me well. They are _______ too long _______ too short.
—Why was Miss Read so angry with you this morning? —She asked me _______.
—It’s dangerous to swim here. Look at the sign! —Oh, I _______ it.
—Will you give me a hand? I have some trouble_______ the scientific problem. —Don't worry. I'll try my best to help you _______.