Question

Complicated _____ it is, the problem can be solved in only two hours with an electronic computer.

A.though
B.eventhough
C.evenif
D.as

Answer 1

【答案】：D
句意：虽然这个问题很复杂，但是用计算机只要两个小时就能解决。这里用了adj+as it is句型，表示虽然……。其他选项不符合题意。