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7. Their judgment ___________ reasonable. 正確答案:A 題目注釋 A . may beB . ought toC . beD . had to be18. Grandma _______ run very fast when she was young. 正確答案:D 題目注釋 A . mustB . can39。tC . must be able toD . must have been able to19. After her son39。s death, the old lady _____ often sit at the window, deep in thought. 正確答案:A 題目注釋 A . wouldB . shouldC . couldD . might√20. Why _________ you take the book without permission? 正確答案:A 題目注釋 A . shouldB . wouldC . oughtD . might