Only in this way finish the work ahead of time.A. they canB. they can doC. can do theyD. c

问题补充：

Only in this way finish the work ahead of time.

A. they can

B. they can do

C. can do they

D. can they

答案：

A. they can

B. they can do

C. can do they

(答案→)D. can they

解析：考查倒装结构。Only + 介词短语 + 倒装结构，句意：只有这样他们才能提前完成工作。