[ Modals - Conditionals - Future Tenses ]
If you … (to swim) in this lake, you’ll shiver from cold.
A. swam
B. swum
C. will swim
D. swim

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Vocabulary and Grammar › View. The _____ of the rainforest will cause huge problems for humans.
A. interference
B. contamination
C. destruction
D. reference
Grammar › View
Adam and Ali _________ English very well.
A. speak
B. speaks
C. speaking