精选优质文档-倾情为你奉上1. we should remember to turn off the lights when_(leave)the classroom.2. What do you think_(cause)the traffic accident.3. What _ you_(dig) when the noise came out?4. Cities will be more and more beautiful if more flowers _(grow).5. There _(be) great changes to his place over the past 10 years.6. Litter shouldnt _(drop) in public places.7. We should do what we can_(keep) our city clean.8. He was so tired that he _(fa
