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If the sea water continues to be polluted, many fish species ______ extinct.

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If you spoke more slowly, he _____ you.

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If I _____  you, I ____ learn one more language.

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If you want your tea sweeter, you _____ need to add some more milk or sugar.

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I think you _____ regret if you _____ to give up hope. Fortunately, you did right thing.

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If she ____ more, she ____ not be overweight now.

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I think that if you _____ in his shoes, you ______ in the same way.

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If she _____ Chinese, I believe that she _____  it very well. However, she doesn’t pay any attention to it.