75. __________(理完发之后)，Professor Smith went straightly to the laboratory to proceed with his experiments.
76. Living in the desert has many problems, ______________(缺水并不是唯一的问题).
77. The production __________(增加到每月500吨) by the end of this month.
78. Both boys and girls put much emphasis ________________(有足够的钱以便到外面去痛快享受).