87. Charity groups organized various activities to ________（為地震幸存者籌款）.
88. Linda_______（不可能收到我的電子郵件）；otherwise, she would have replied.
89. It's my mother________(一直在鼓勵我不要灰心)when I have difficulties in my studies.
90. The publishing house has to ________（考慮這部小說的受歡迎程度）.
91. It is absolutely wrong to _________(僅僅以金錢來定義幸福).

答案及解析：

87. Charity groups organized various activities to raise money for the survivors of the earthquake. (為地震幸存者籌款)
【解析】本題考察動詞raise的用法。raise money 表示“籌款”。同時考生要注意survivor （幸存者）的拼寫。

88. Linda couldn’t have received my e-mail (不可能收到我的電子郵件), otherwise, she could have replied.
【解析】本題考察混合型虛擬語氣。otherwise提示我們句子后半句是與過去事實相反（事實是Linda沒有回復），因此用could+have+過去分詞。句子前半句是在陳述一種事實，從句子后半句could have +過去分詞我們可以推斷前面“沒有收到我的電子郵件”也是在發生在過去，且對現在產生了影響（還沒有收到回信），因此這里用現在完成時，could have +過去分詞。

89. It’s my mother who/that keeps encouraging me not to lose heart (一直鼓勵我不要灰心) when I have difficulties in my study.
【解析】本題考察了強調句型和動詞encourage的搭配。①強調句型it’s … that/who… ②encourage sb. (not) to do sth. 鼓勵某人（不）做某事。

90. The publishing house has to consider the popularity of this novel. (考慮這本小說的受歡迎程度)。
【解析】本題考察了“考慮”的表達，可以用動詞consider，也可以用詞組take… into consideration。同時考生要注意名詞popularity (受歡迎程度) 的拼寫。

91. It’s wrong to define happiness only by money.(僅僅以金錢來定義幸福)