1) If you ______ your experiment work, you ______ happy. a) saw, felt b) see, feel c) will see, feel d) sees, feels 2) If you ______ water, it ______ at 100 C. a) heat, boil b) heats, boils c) heat, bolis d) heated, boiled 3) I ______ always exhausted the next day if I ______to bed very late. a) be, go b) am, will go c) was, went d) am, go 4) They ______ the schools in the USA if the temperature ______ to -20 C. a) close, drops b) close, drop c) close, will drop d) closes, drop 5) If my brother ______ under the ladder, he ______ he will have bad luck. a) walk, think b) walks, thinks c) walked, thought d) will walk, thinks 6) My sister ______ her science classes if she ______ in a group with her friends. a) enjoys, work b) enjoys, will work c) enjoys, works d) enjoying, working

Prepare 4 Unit 16 Zero Conditional

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