第16题: [单项选择]What can we learn from the conversation A. The mother lives with her son. B. The mother’s son has died. C. The mother is always waiting for his son’s letters. 参考答案:C 答案解析:[听力原文] F: This mother is always looking forward to her son’s letter. M: Yes... It was five yea
第34题: [单项选择]Fluoride deters tooth decay by reducing the growth of bacteria that destroy tooth enamel. A. facilitates B. overwhelms C. inhibits D. loosens 参考答案:C 答案解析:deter:阻止、威慑,与inhibit(抑制、阻止)意思相近;facilitate:使便利、促进;overwhelm:使不知所措、压倒;loosen:解开、放松。