47. Production of these chemicals causes serious_______pollution
A. environment
B. environmental
C. environmentally D. environmetalist
48. My friend said he really enjoyed doing_______experiments and finding out how things worked
A. science
C. scientist
D. scientific
B. scientism
49. Mary and Tom are getting married in July
-_____________
A. How wonderful
B. That’s a relief
C. That’s awful
D. Oh no!
50.Hoa told me that_____ our new teacher of English.
A. she wants to become
B. she wanted to become
C. she will become
D. she wanted becoming
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