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