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¡¡¡¡31." Lily£¬let's make vegetable salad. How many ________do we need?" “One is enough.”
¡¡¡¡A. oranges B. potato C. tomatoes
¡¡¡¡32. "Whose T-shirt is this?" "It_____ be John's. It's much too small for him.”
¡¡¡¡A. might B. can't C. needn't