第20题: [单项选择]Calculations, which are astronomically exact, have been made ______ with the use of computers. A. possible B. it possible C. possibly D. to be possible 参考答案:A 答案解析:本题为语法搭配题。根据题干,本题考点在make sth.possible这样一个词组上。 possible在本句中作主语补足语。本句大意为:计算机的运用使得天文学上的精确计算成为可能。