单项选择题


A．how
B．why
C．nothing but
D．nothing like
<上一题 目录 下一题>
热门 试题

单项选择题
A．enoughB．muchC．too muchD．much too
A．enough
B．much
C．too much
D．much too
单项选择题
According to the text, the fundamental cause of the ice ages is.
A．periodic changes in the earth's orbit around the sun
B．fossil remains of one-celled animals
C．alternating cold and warm seasons
D．changes in distance of the earth from the sun
相关试题