(·山东 26)Mark needs to learn Chinesehis company is opening a branch in Beijing.A. unles

问题补充：

(·山东，26)Mark needs to learn Chinesehis company is opening a branch in Beijing.

A. unless

B. until

C. although

D. since

答案：

A. unless

B. until

C. although

(答案→)D. since

解析：考查状语从句。句意：Mark需要学习汉语是因为他的公司要在北京开分公司。连词since表“由于，因为”符合语境。