单项选择题
I used to smoke（），but I gave it up three years ago.
A.severely B.strongly C.seriously D.heavily
单项选择题 When there are small children around，it is necessary to put bottles of pills out of（）.
单项选择题 Be careful，because that knife is very（）.
单项选择题 The smoke from that factory is（）our air to a dangerous degree.
