He describes everything in order, which makes excellent impression upon us.
A. the; an
B. /; the
C. the; /
D. /; an
网友回答
A. the; an
B. /; the
C. the; /
(答案→)D. /; an
解析：in order意为“有序地”；make an impression on / upon sb意为“给某人留下印象”。句意为“他叙事有条不紊，给我们留下了很好的印象”。