5. Its _________________________________ to walk on the street at night, so you should be careful.
A. polluted B. dangerous C. safe D. modern
6. ___________________________ your garbage. _______________________________ just throw them away.
A. Recycle / Not B. Recycling / Not C. To recycle / Dont D. Recycle / Dont
7. ___________________________________________ in Ha Tinh make a lot of fish die.
A. Deforestation B. Water pollution C. Noise pollution D. Air pollution
8. We might go _________________________________________ holiday to the Moon in the future.
A. on B. to C. in D. from
9. My friend likes Mr. Bean _________________________________________________ I think hes awful.
A. so B. but C. because D. and
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