You can’t complain of being lonely         you don’t make any effort to communicate

with others.

A. when   B. until    C. unless  D. once  

You can’t complain of being lonely_______you don’t make any effort to communicate

with others.

A. when  B. until   C. unless D. once

You can’t complain of being lonely  ____   you don’t make any effort to communicate with others.

A. when   B. until     C. unless    D. once

28. You can’t complain of being lonely____you don’t make any effort to communicate with others.

A. when                B. until                        C. unless                      D. Once

You can’t complain of being lonely _______ you don’t make any effort to communicate with others．

A．when        B．until          C．unless        D．once

28. You can’t complain of being lonely____you don’t make any effort to communicate with others.

 You can’t complain of being lonely         you don’t make any effort to communicate

with others.

A. when            B. until         C. unless          D. once