题目内容
—____ when has the country been open to international trade?
—1978,I suppose.
A.Since B.In
C.From D.After
.—____ when has the country been open to international trade?
—1978, I suppose.
A. Since B. In C. From D. After
_____the house Mr.Li has been broken into ?
A.When was it that B.When has C.Has D.had
-----when has the country been open to international trade?
-----1978, I suppose.
