—Let’s go out for a walk.
—You’d better not. These days the air is getting much ________ than it was before.
A. better B. worse C. cleaner D. easier
You get wet all over. It must be raining ________ outside.
A. heavily B. hardly
C. carefully D. loudly
—Dinner is ready. Help yourself, please!
—Wow! It ________ delicious. You are really good at cooking.
A. gets B. sounds C. tastes D. turns
As a student, we should keep our classroom ________.
A. dirty B. clean C. clear D. noisy
Some children prefer to eat junk food ________ it’s not good for their health.
A. although B. if C. as D. when
—Oh, it’s too difficult for me ________ the work in such a short time.
—Anything is possible if you put your heart into it.
A. finish B. finishing
C. finished D. to finish
