The school rules state that no child shall be allowed out of the school
during the day, ______ accompanied by an adult.
| A．once | B．when | C．if | D．unless |
As we all know, an island is a piece of land ________ by water.
| A．surround | B．surrounding | C．surrounded | D．to be surrounded |
The professor gave me quite a few novels, ________ is here for you to read this evening.
| A．of that one | B．of one which | C．which one of | D．of which one |
— How many students are league members in your school?
— League members ________ one fifth of the number of the students in our school.
| A．take up | B．make up | C．set up | D．fix up |
I like this jacket better than that one, but it costs almost three times _______.
| A．as much | B．as many | C．so much | D．so many |
Let’s learn to use the problem we are facing _______ a stepping-stone to future success.
| A．to | B．for | C．as | D．by |