You can’t complain of being lonelyyou don’t make any effort to meet peopleA. untilB. when

问题补充：

You can’t complain of being lonelyyou don’t make any effort to meet people．

A. until

B. when

C. once

D. though

答案：

A. until

(答案→)B. when

C. once

D. though

解析：本题考查连词。until直到；when既然；once一旦，曾经；though 虽然，尽管。句意：既然你不作出任何与他人交往的努力，你就不能抱怨自己是孤单的。