问题

______ difficult the problem was, he tried his best to solve it[ ]

A: No matter
B: Although
C: Whatever
D: However

正确答案是：

同类题型

Is this your pencil–Yes, ______.

I would like to play piano instead of playing ____ chess.

use with the ground is valued ____ three thousand yuan, but I bought it ____ only one thousand yuan.

______–I’ve just read a piece of news about space discovery.

Why h D．expected