6. I’m sorry. I can’t meet up this weekend. We__________ to Wales on Friday.
A. go B. are going C. will go D. has gone
7. In the 16th century, French and British settlers__________ in Canada.
A. arrive B. have arrived C. was arriving D. arrived
8. Light pollution has a wide range of negative effects________ human health.
A. on B. of C. for D. to
9. ________can cause high blood pressure, heart problems, sleep disturbances, and hearing problems.
A. Air pollution B. Light pollution C. Water pollution D. Noise pollution
10. The levels of carbon dioxide in the atmosphere have risen________ the burning of fossil fuels.
A. therefore B. because C. in spite of D. due to
11. If noise pollution happens regularly, It ………………………stress.
a. will cause b. would cause c. had caused d. cause
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