參考答案：

　　87.Because of the noise outside, Nancy had great difficulty in focusing on her experiment (集中注意力在實驗上)

　　88.The manager never laughed; neither did she lose temper (她也從來沒有發過脾氣)

　　89.We look forward to being invited to attend the opening ceremony(被邀請出席開幕式)

　　90.It is suggested that the air conditioner should be installed beside the window(要安裝在窗戶旁)

　　91.The 16-year-girl decided to travel abroad on her own despite her parents strong disagreement(她父母的強烈反對)

　　答案解析：

　　87題語法點為have difficulty in doing sth，另外focus on為四級高頻詞組需要牢記。

　　88題為neither 放在句首的倒裝句，并且是部分倒裝，把助動詞did 提前，另外發脾氣lose temper 為四級核心高頻詞組。

　　89題短語look forward to doing sth中的to為介詞，后接的動詞需要變成動名詞，另外考察了被動的用法：be invited to do sth; 開幕式為the opening ceremony固定搭配。

　　90題為It is suggested that的虛擬語氣，是四級重要考查語法點。that后面的句子結構為“主語+should+do sth”，此句中air conditioner“安裝在窗戶旁”暗含了被動含義，需要寫成be installed。

　　91題考查despite后接名詞，表讓步含義。

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