问题补充:
There is no doubt,in my opinion, matters is not the speed,but the quality of the product.
A. that
B. which
C. what that
D. that what
答案:
A. that
B. which
C. what that
(答案→)D. that what
解析:考查同位语从句和主语从句:句意:在我看来,毫无疑问,重要的是不是速度。而是产品的质量。Doubt后面是同位语从句,用that连接,说明doubt的内容。在同位语从句中is前面是主语从句,缺少主语,用what连接。选D。