I can remember very few ______ when he had to cancel his plans because of poor health.A.situationsB.conditionsC.occasionsD.circumstances
参考答案：
C解析这题考查词义辨析 ：situations形势，conditions条件，occasions机会，场合， circumstances环境，几个词只有 occasion后面是 when引导定语从句 。句意是：我能记住很少有机会他会因为身体差取消计划的。选C。
