—So you missed the English class this morning? — I arrived 20 minutes after it started.A.

问题补充：

—So you missed the English class this morning?

— I arrived 20 minutes after it started.

A. Not exactly.

B. Not necessarily.

C. Not nearly.

D. Not likely.

答案：

(答案→)A. Not exactly.

B. Not necessarily.

C. Not nearly.

D. Not likely.

解析：

词义辨析Not exactly.不完全是Not necessarily未必 Not nearly.远不及Not likely.不可能，根据句意：你错过了早上的英语课？我在开始后20分钟到的。说明第一人说的不完全对。所以选A。