情景选择。
1. 当你要说：“小明正在摘树叶。”时，应说：[ ]
A. Xiaoming picks up leaves.
B. Xiaoming is picking up leaves.
C. Xiaoming is picking leaves.
2. 当你要说：“他们在树林里。”时，应说：[ ]
A. He is in the woods.
B. They are in the wood.
C. They are in the woods.
3. 当你要说：“我正在观察昆虫。”时，应说：[ ]
A. I'm watching insects.
B. I'm looking insects.
C. I'm seeing insects.
4. 当你要说：“蚂蚁正在吃什么？”时，应说：[ ]
A. What do you eat ants?
B. What are ants eating?
C. What are the ants eating?
5. 当你要说：“他正在下棋吗？”时，应说：[ ]
A. Is he playing chess?
B. Does he play chess?
C. He is playing chess.