It is such a difficult problem _______ no one can work out.
| A．as | B．that | C．so | D．thus |
They made_____a rule to meet and have a meeting on Sunday evenings .
| A．it | B．that | C．this | D．which |
We grow all our fruit and vegetables, _____ saves money, of course.
| A．what | B．as | C．that | D．which |
Shanghai lies _____ the west of the Pacific Ocean, where you can’t find many islands ____ the coast.
| A．on, off | B．to, along | C．in, off | D．on, along |
My uncle’s house in the downtown area is much smaller than ours, but it twice____ expensive.
| A．so. | B．as. | C．too. | D．very. |
It is not who is right but what is right ____ is of importance.
| A．which | B．it | C．this | D．that |