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【題目】—Oh dear! How can you________such important information?

【題目】---Mum, have you seen my U-Disk?

【題目】The engine just________; something seems ____wrong with it.

【題目】Working in the kitchen for years made Alice ________ a good cook．

【題目】Living in the central Australian desert has its problems, _____ obtaining water is not the least.

【題目】Theoldmanstoodbythewindow,hiseyes _______onthepeopleplayinginthepark.

【題目】Mary is so quiet a girl that she seldom speaks in public places unless _____ to.

【題目】It is freezing here．Wear your coat, ______ you’ll catch a cold．

【題目】If you are a man who always _______ to do everything, you are unlikely to achieve your goal.

【題目】—The exam was easy, wasn’t it?