_______he is busy, ________he helps us often.
—What’s wrong with them? -- They were ____ their daughter being out so late at night.
I don’t think Unit2 is more difficult. I think it’s _____.
Why are you making so much noise at midnight? I can’t ____it. Please keep quiet.
Please change a sweater for me. This one is ____ large for me.
–Who left the black coat here? -- I’m not sure. It ____ our math teacher’s. He was here a moment ago.