春秋以前，什么是一个武士必须掌握的两种本领？（）
A.射箭和挥刀
B.射箭和驾车
C.挥刀和驾车
D.执矛和驾车
参考答案：B
Read and choose.（读句子，根据内容选择正确的句子）
1. 如果你想说”，应该说：___________[ ]
A. They have a picnic.
B. They are having a picnic.
2. 如果你想问“John正在做什么？：___________ [ ]
A. What is John doing?
B. What does John do?
3. 如果你想说”，应该说：__________[ ]
A. She is coming.
B. She is running to us.
大肠菌群
