Astronauts in a spaceship have to _______weightless conditions _______are quite different from ______are on the earth. 

A．do with; which; those

B．deal with; that; that

C．solve; that; what

D．face; which; these

在进行模块测试时，要为每个被测试的模块另外设计两类模块：驱动模块和承接模块，其中______的作用是将测试数据传送给被测试的模块，并显示被测试模块所产生的结果。