问题
选择题
Can you see two butterflies in the middle of the flowers?
A．are there, fly
B．there are, flying
C．there are, fly
D．are there, flies
答案
答案：B
题目分析：句意：你看见有两只蝴蝶正在花中飞吗？There be .......doing ....有.....正在做某事。there be 句型变成一般疑问句是需把be动词提前。