单选题 William Byrd was the owner of the largest library in colonial _____ .

单选题 If cauliflowers are not _____ from extreme temperatures， the heads get discolored.

单选题 Grover Cleveland was the first president_____ in the White House.

单选题 Since writing home to their parents for money, they had lived _____hope.

单选题 The gas_____ from the tank is dangerous.

单选题 Exobiology is the study of life_____ other planets.

单选题 Rice is the_____ food of most Southeast Asians.

单选题 When it started to snow, we turned round and _____ the hotel.