1．____________ (位于波士顿)，Harvard University is one of the best universities in the U．S．

2．Please __________ (将问题提出来)at the next meeting．

3．It is essential that these application forms ________ (尽早寄出去)．

4．His tastes are _______ (和我的相同)．

5．It is high time that we _____________(保护濒临灭绝的动物)．

1．答案：Located/Situated in Boston

 [解析] 1)词组：locate/situate in(位于，坐落于)2)分词：此处应使用过去分词。

2．答案：bring the problem forward

[解析] 词组：bring forward(提出)

3．答案：be sent as early as possible

[解析] 主句中的表语是essential，谓语动词应使用“(should)+动词原形”的虚拟形式，同时使用被动语态。

4．答案：in harmony with mine

[解析] 词组：in harmony with(和……相同)

5．答案：protected the endangered animals

[解析] 1)虚拟语气：假设性虚拟语气句型it is (high) time (that) we did sth．， that 引导的从句中谓语动词应使用过去式；2)词汇：endangered(有危险的)