�. The reason ________ he referred to for his success is ________ he always working hard.

. They are teachers and don't realize the basic/primary rules and principles _____ to start and run a company.

. It is far better for one to drink milk, ________ one gets healthful nutrients, than to drink coffee, ________ contains harmful substances.

. The mother kissed her baby, ________ was in her arms.

. I still remember/will never forget the day ________ I first came to the college.

. I still remember/will never forget the days ________ we spent together.

. I still remember/will never forget the days ________ we studied/lived together//worked day and night to support the whole family.

定語(yǔ)從句及其關(guān)系代詞與副詞
. Jane came to settle down in New York in , ________, some time later, she became a middle school teacher.

. The prices have been going up, so that the richer you get, the less rich you are than ________ you think you ought to be.

. The production of television commercials must be professional ________ they aim at promoting good service, or public education.