The crafty child tricked his innocent brother, a particularly______and trusting boy, into committing a mischievous prank. A．guileless B．intrusive C．astute D．opportunistic
A. A．guileless B．intrusive C．astute D．opportunistic
【参考答案】
A 形容词词义辨析。句中的and表示空格应填入与trusting同义的词，直接选择guileless。