The company had about 20 notebook computers but only one-third used regularly. Now we have 60 working all day long.
| A．is |
| B．are |
| C．was |
| D．were |
. It is far better for one to drink milk, ________ one gets healthful nutrients, than to drink coffee, ________ contains harmful substances.
| A．what, what | B．where, which | C．from which, which | D．in which, what |
. They are teachers and don't realize the basic/primary rules and principles _____ to start and run a company.
| A．in which | B．for whom | C．with which | D．of whom |
. The reason ________ he referred to for his success is ________ he always working hard.
| A．why, that | B．why, because | C．that, that | D．that, because |
. The teachers hope the little ________ has been learned will be useful when they leave school.
| A．that | B．what | C．knowledge | D．which |
. “This is a window, ________ the sun comes in.” said the lady to her baby.
| A．where | B．which | C．by which | D．through which |