我国资本主义萌芽最早出现在[ ]
A．唐朝
B．宋朝
C．元朝
D．明朝
答案：D
—______ the baseball on the sofa?
—Yes, it is. [ ]
A. Is
B. Are
C. Am
D. Does
I didn’t know __________. Can you tell me?
A．who to speak to
B．who speak to
C．who to speak
D．who spoke
