It is essential that these application ______ forms back as early as possible.

单项选择题Dr. Smith was always ______ the poor and the sick, often providing them with free medical care.

单项选择题—You'd better ______ work too hard like this. —I see. You mean ______ too hard makes one tired and ill.

单项选择题You aye a team star! Working with ______ is really your cup of tea．

单项选择题I（）have watched that movie--it'll give me horrible dreams.

A.shouldn' t
B.needn' t
C.couldn't
D.mustn't

单项选择题______ is best known for the technique of dramatic monologue in his poems.

单项选择题He was made______the ohl lady______breaking her window.

单项选择题You should know better than______your little sister at home by herself.

单项选择题—I'm going to study engineering in Tsinghua University tomorrow. —______.

单项选择题Bats are surprisingly long-lived creatures, some ______ a life span of around 20 years.

单项选择题是英语学习成功的关键。