________ that the trade between the two countries reached its highest point. A) During the 1960’s B) It was in the 1960’s C) That it was in the 1960’s D) It was the 1960’s（B）

The story happened ______. A: in 1960's B: in his 60's C: in 60's D: in the 1960's

是1990s还是1990’s

It is not rare in that people in their fifties are going to university for furthereducation.( A: 1990s B: the 1990 C: 1990's D: the 1990s

（）是“UNIX元年”。 A: 1960 B: 1970 C: 1980 D: 1990

(New uses) for plastics (were found) during (the) 1950’s and 1960’s in medicine, space, research, (industrial), and architecture.（） A: New uses B: were found C: the D: industrial

China’s Singles’ Day began on November 11, 1990 as a day for unmarried or uncoupled people to celebrate their lives.

发育生物学作为一门学科，是在下列哪个年代创立的（）。 A: 1950～1960 B: 1960～1970 C: 1970～1980 D: 1980～1990

In Tannen’s research(1990) there are altogether dimensions along which men and women tend to form different interpretive frames.?

原文:Since the 1990's, climate problems ha...取话语优势;三是广泛参与,改造游戏规则。