The line is engaged. I can’t now.A. get onB. get alongC. get throughD. get down

问题补充：

The line is engaged. I can’t now.

A. get on

B. get along

C. get through

D. get down

答案：

A. get on

B. get along

(答案→)C. get through

D. get down

解析：短语辨析。get on上车，进展； get along使前进；与……和睦相处； get through到达，接通电话；get down下来，使沮丧。句意：线路正忙。我现在不能接通电话。故选C。