. _______ conventional black ink costs newspaper about thirty cents, most rub-resistant inks add at least ten cents more to the bill.
A、While
B、Furthermore
C、Meanwhile
D、Moreover
【正确答案】：A
【题目解析】：A【句意】用传统的墨水印刷大约需要三十美分，而防摩擦的墨水至少要贵十美分。【解析】furthermore（此外，而且），meanwhile（同时）和moreover（再者，此外）均是副词，都不能引导从句。只有while是连词，意为“虽然”，含有让步之意，可以引导从句，如：While I admit that the problems are difficult, I don't agree that they cannot be solved. 虽然我承认这些问题很难，但我不认为它们不能解决。
