--Tom said their teacher speaks too quickly for him and Betty to understand.
-- Mary and Bob said they could understand him.
A. Forget it!
B. Think nothing of it!
C. Really?
D. Never mind.
网友回答
A. Forget it!
B. Think nothing of it!
(答案→)C. Really?
D. Never mind.
解析：考查交际用语。题意：“Tom说老师讲话太快，他和Betty听不懂？”“是吗？Mary和Bob说他们能听懂。”Forget it 和 Think nothing of it 意为“算了”、“别上心”，常用于劝慰，化解不安等，不合语境；Never mind常用于回应感谢或化解焦虑。really表示“兴趣、惊奇、异议、怀疑”等。故C项正确。