—_______when has the country been open to international trade?
— 1978,I suppose.
| A．Since | B．In | C．From | D．After |
Frankly speaking, ________ of them knew what the other was doing that morning.
| A．none | B．neither | C．some | D．all |
Our refrigerator is ________ again.We'd better buy a new one instead of repairing it.
| A．in order | B．by order |
| C．under order | D．out of order |
An artist who was recently traveling on a ferry to the southern island discovered ________ a long lost antique Greek vase.
| A．at random | B．by chance |
| C．in turn | D．on occasion |
I am always delighted when I receive an email from you.________ the party on July 1st, I shall be pleased to attend.
| A．On account of | B．In response to |
| C．In view of | D．With regard to |
________ his career as an actor he never gave up his hope of becoming a Hollywood star.
| A．Throughout | B．Within |
| C．For | D．In |