They found __________ impossible to finish so much work in such a short time.
A：that
B：it
C：it is
D： this
Reading her biography, I was lost in admiration for _______ Doris Lessing had achieved in literature.
关于机械运动,下列说法正确的是( )
下列叙述正确的是（ ）
一个长方形的长是25厘米，是宽的5倍，那么这个长方形的宽是____厘米，它的周长是____厘米．
