A．so the people haveB．the people have soC．so have the p……

单项选择题Do what you think is right, ______ they say.

单项选择题Living things are ______ cells, and cells do not grow to more than twice the size they were at first.

单项选择题Every director needs an assistant that he can ______ to take care of problems that may occur in his absence.

单项选择题No sooner had I closed the door than somebody started knocking ______ it.

单项选择题If you don t put the milk in the refrigerator, it may ______.