Question

Do you know ______ Guangzhou tomorrow?
A. whether they leave for              B. whether will they leave for      
C. whether they are leaving for

Answer 1

C

C 考查宾语从句。宾语从句用陈述句语序，B是疑问语序，排除B。A项时态不对，表将来用will+动词原形或be going to do sth.句型。故选C。