（2017年贵州安顺） —Excuse me, sir, smoking _____ in the gas station.
—Oh, I'm awfully sorry.
A. doesn't allow B. is allowed C. aren't allowed D. isn't allowed
（题文）As China grows stronger and stronger, Chinese _______________ in more and more schools out of our country.
A. teaches B. is taught C. has taught D. was taught
（题文）（2017年山东青岛）Teenagers have to be 18 years old before they_____ to drive a car.
A. are allowed B. . will be allowed C. . allow
（2017 • 安徽）Mr. Green _________ to sing an English song at the party and he sang well.
A. was invited B. invited C. is invited D. invites
—Do you know her well?
—Sure. We ________ friends since ten years ago.
A. were B. became
C. has become D. have been
--- How do you usually go to school?
--- I to school on foot.
A. go B. went C. was going D. will go
