A model or an experiment in a science class can help students see things which would ______ remain hidden.
| A．otherwise | B．still | C．thus | D．therefore |
--Why are you so late ?
--I was on the way when it suddenly__to me that I had left my notebook home, so I had to fetch it.
| A．occurred | B．hit | C．happened | D．reminded |
It is ______ the customers’ needs that has made chain stores so popular in big cities in China.
| A．meeting | B．met | C．to have met | D．being met |
. No one really knows exactly when the first people arrived in_____we now know as California.
| A．that | B．which | C．what | D．where |
I feel sure that qualification, ability and experience, you are well suited to the position we have in mind.
| A．in need of | B．in spite of | C．by means of | D．in terms of |
The theory most scientists objected to in the end .
| A．being proved to be of significance | B．was proved to be significance |
| C．proving to be significant | D．proved to be significant |