单项选择题How do scientists know motherhood may make women smarter ()
A. Some researchers have told them. B. Many women say so. C. They know it by experimenting on rats. D. They know it through their own experience.
问答题巩固性原则
问答题遗传
单项选择题______ the project in time, the staff were working at weekends.
单项选择题It was believed that things would get worse, but()it is they are getting better.
A. before B. after C. because D. as
单项选择题—What did Maria say —().
A. Maria said that she likes their uniforms. B. Maria said that she doesn't like their uniforms. C. Maria said that she didn't like their uniforms. D. Maria said that she was like their uniforms.
单项选择题—______ Your name again, please. —It's Bell Green.
单项选择题Many people keep dogs as pets because dogs are regarded as()friends to people.
A. lonely B. only C. loyal D. fair
单项选择题No sooner had we reached the top of the mountain ______ we all sat down to rest.
单项选择题He is only too ready to help others, seldom,(), refusing them when they turn to him.
A.if never B.if ever C.if not D.if any