A.This invention is of great importance to the progress of society.
B.It is said that celebration will be postponed to next week.
C. Our office has recently converted to a new computer system.
D. It's well-known that education is the foundation of a prosperous country.
据说庆典将延期到下周。
正确答案:B
答案解析:有
这一发明对社会进步有着重要意义
正确答案:A
答案解析:有
众所周知,教育是兴国之本。
正确答案:D
答案解析:有
最近我们]办公室更换了新的电脑系统。
正确答案:C
答案解析:有
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