用两只手打出的手语，表示一定词义的手势，叫做（）
A、单手手势
B、双手手势
C、动作手势
D、混合手语
参考答案：B
____all the required papers. he didn't answer the questions fluently in class.
A．Having not read
B．Not having read
C．Not read
D．Not to read
The weather in Beijing is _____ than that in Changchun.[ ]
A. hoter
B. hotter
C. a lot of hotter
D. hot
