astronauts cannot go to a baseball game or a movie in orbit , there are many familiar activities that they can still enjoy.
A. While
B. Since
C. Before
D. Unless
网友回答
(答案→)A. While
B. Since
C. Before
D. Unless
解析:
试题分析: 考查连词用法。A当。。时候,然而,尽管;B既然,自从;C在。。。之前;D除非。前句讲宇航员不能做的事,后句说他们还有很多类似的可以做的事,由此可知前后句子意思为转折关系。所以A选项正确。句意:尽管宇航员在飞行轨道中不能去打棒球或者看电影,他们还是有很多类似的可以娱乐的活动。