单项选择题
Perhaps you（）leave now. Your friend may be waiting for you outside.
A. must B. could C. should D. will
单项选择题 Just think, in（）three months it'll be summer again.
单项选择题 Either of the children（）quite capable of looking after the baby.
单项选择题 I caught the last bus from town, yet Henry came home（）that night.
