The word' incessantly' ( Para 1 ) could best be replaced by ______.
A.confidently
B.constantly
C.intelligently
D.optimistically

A.A.confidently
B.constantly
C.intelligently

【参考答案】

B
解析：由上下文推断，incessantly是“不休止”的意思，和constantly“坚持不懈地”意思上更为相近。