UNIT 6: THE ENVIRONMENT
Choose the best option to complete each of the following sentences. 
1.    They shouted and looked ________at me when I broke the vase. 
    A. angry    B. angrier    C. angrily    D. anger
2.    He is tired, ________he stayed up late watching TV. 
    A. so    B. because    C. but    D. and
3.    We are talking about the preservation of ________resources. 
    A. natural    B. naturally    C. nature    D. naturalize
4.    Is he really ________that you can’t come there? 
    A. disappoint    B. disappointed    C. disappointing    D. to disappointing
5.    It is our policy to ________forest and increase forestation. 
    A. protect    B. protecting    C. to protect    D. protected
6.    I suggest ________to the movies. 
    A. go    B. to go    C. going    D. went
7.    They made their living by ________fish in the ocean every day. 
    A. catch    B. catching    C. to catch    D. caught
8.    I will be ________if she manages to sell that motorbike at a high price.
    A. surprise    B. surprised    C. suprising    D. to surprise
9.    If you know where she lives, please let me ________. 
    A. know    B. knew    C. known    D. to know
10.    If you live in this small town, you ________earn much money. 
    A. aren’t    B. couldn’t    C. can’t    D. didn’t
11.    Unless you understand, I ________explain it again to you.
    A. am    B. was    C. will    D. would    
12.    If he ________a student, he will get a discount. 
    A. is    B. was    C. were    D. will be
13.    Because plastic bags are very hard to ________, they will cause pollution.
    A. dissolve    B. wrap    C. tear    D. collect
14.    These materials can be ________into other packaging products. 
    A. reused    B. reduced    C. removed    D. recycled
15.    If people ________public transport, there will be less pollution. 
    A. use    B. will use    C. can use    D. used
16.    Minh’s English is excellent. He speaks ________. 
    A. perfectly English    B. English perfectly    C. in perfect English    D. English perfect
17.    If you go ________doing that, you’ll end ________ in serious trouble. 
    A. up/ with    B. on/ up    C. off/ with    D. out/ up
18.    Crops are sprayed with ________to kill insects. 
    A. fertilizer    B. manune    C. dung    D. pesticide
19.    What about ________used paper, bottles, and cans every day?
    A. collect    B. collecting    C. to collect    D. to collecting
20.    If the sea water continue to be polluted, many fish species ________extinct. 
    A. became    B. will become    C. would become    D. become