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IF WE GO ... LITTERING, THE ENVIRONMENT WILL BECOM...
IF WE GO ... LITTERING, THE ENVIRONMENT WILL BECOME SERIOUSLY POLL...
TRAC NGHIEM ANH 9 HKII 2
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26. If we go ... littering, the environment will become seriously polluted.
A. to
B. in
C. out
D. on
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26.
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TRAC NGHIEM ANH 9 HKII 2