—Mom, must I take out the trash now?
—No, you ________. You may take a rest first.
| A．mustn’t | B．can’t |
| C．shouldn’t | D．don’t have to |
—Have you watered the plants yet, Kathy? —Yes. I ________ that this morning.
| A．will do | B．did | C．have done | D．was doing |
—Let’s plan a surprise party for our class. What’s your idea?
—Why not ________ a short play?
| A．get on | B．keep on | C．have on | D．put on |
—Will you please answer the door? It ________ be your sister.
—Sorry, I ________. I’m feeding the rabbit.
| A．must; mustn’t | B．may; can’t | C．will; can’t | D．must; needn’t |
—Jim, is physics difficult to learn in high school?
—Sure. No subject can be learned well ________ hard work.
| A．without | B．from | C．through | D．for |
—Wow! I’m full. The bread is delicious!
—That’s right! It will be ________ with better. Try next time!
| A．good | B．best | C．better | D．worse |