3. Read and guess. (读一读，猜一猜)
1) It's a big wheel. It's wonderful and it's new. It's in London. What is it?

2) It's a famous clock. It's very tall and old. It's in London. What is it?

3) It's a long wall. It's in China. But it's famous in the world. What is it?

1) The London Eye
2) Big Ben
3) The Great Wall

4. Fill in the blanks. (填一填)
went send writing took was
Dear Sam,
How are you? I'm fine. Now I'm sitting on my bed and to you.
On Sunday, my father, my mother and I out to the park. It sunny, and we played together. It was fun! And my father some photos. I will them to you tomorrow.
Yours,
Lingling

writing, went, was, took, send

本题可根据上下文语境以及所给单词的时态来填空。
第一空：根据“Now I'm sitting...”可知，此处描述的是现在正在进行的动作，要用现在进行时，其结构是“be + 动词的现在分词”，所给单词中“writing”是“write”的现在分词，符合语境。
第二空：根据“On Sunday”可知，此处描述的是过去发生的动作，要用一般过去时，“went”是“go”的过去式，“go out”表示“出去”，符合语境。
第三空：描述过去的天气状况，要用一般过去时，“was”是“is”的过去式，符合语境。
第四空：同样描述过去发生的动作，“took”是“take”的过去式，“take photos”表示“拍照”，符合语境。
第五空：“will”是一般将来时的助动词，其后接动词原形，“send”是动词原形，“send sth. to sb.”表示“把某物寄给某人”，符合语境。