单项选择题
Be careful，because that knife is very（）.
A.sharp B.fast C.quick D.hard
单项选择题 The smoke from that factory is（）our air to a dangerous degree.
单项选择题 （）the TV tower at night，the city looks even more magnificent with all its lights on.
单项选择题 Excuse me，but it is time to have your temperature（）.
