三、选择适当的单词完成句子。
1. What (did/do) you drink last night?
2. Five years ago, he (walk/walked) to school.
3. He (was/is) a student ten years ago.
4. We (live/lived) in a big house now.
5. There weren't (a/any) buses in my city.

1. did 2. walked 3. was
4. live 5. any

一、连词成句。
1. the, office, teachers', is, where
?
2. you, do, a, library, have
?
3. are, there, tigers, some, there
.
4. and, tall, big, are, they
.
5. a, photo, take, let's
.

1. Where is the teachers' office
2. Do you have a library
3. There are some tigers
4. They are big and tall / They are tall and big
5. Let's take a photo

1. 这是where引导的询问地点的特殊疑问句，遵循"疑问词+be动词+名词短语"的结构，将where放在句首，后接be动词is，再接名词短语the teachers' office即可。
2. 这是助动词do引导的一般疑问句，遵循"助动词+主语+谓语+宾语"的结构，do放在句首，后接主语you，再接谓语have，最后接宾语a library。
3. 这是there be句型的肯定陈述句，遵循"There be+名词"的固定结构，用来表示存在某物。
4. 这是主系表结构的陈述句，主语they后接be动词are，用and连接两个形容词作表语，描述事物的外形特征。
5. 这是let's引导的祈使句，用于提出行动提议，遵循"Let's+动词短语"的固定结构。