A．step upB．decreaseC．stopD．controlIn order to improve o……

单项选择题An important part of the national government is the Foreign Service, a branch of the Department of State.

单项选择题The poet William Carlos Williams was a New Jersey physician.

单项选择题The child's abnormal behavior puzzled the doctor.

单项选择题Many fine cooks insist on ingredients of the highest quality.

单项选择题There is an abundant supply of cheap labor in this country.