9. By the middle of the 21st century, people in developing countries .................. more renewable energy. A. uses B. will be using C. used D. have 10. Fossil fuels are very common in our society but they .................. the environment. A. renew B. provide C. waste D. pollute

9.Chọn B

$\Rightarrow$At this time next month we will be going to Ha Long Bay for a holiday.

$\rightarrow$Vì có At this time next month là dhnb thì TLTD

$\Rightarrow$chia câu này là thì TLTD$\longrightarrow$dùng will be using

10.chọn D

$\rightarrow$pollute the environment là làm ô nhiễm môi trường

$\rightarrow$Cấu trúc: S+V+N

$#tytyrrte$