They have done things they ought (　).

A.put on

B.puts on

C.to put

D.putting on

A.put on

B.puts on

C.to put

D.putting on

A.broke in

B.broke down

C.broke out

D.broke away

A. subsequent

B. beneficial

C. sufficient

D. average

A. attention

B. attraction

C. attempt

D. attack

A.having worked on

B.to work on

C.on work

D.working on

A.to take place

B.to take of

C.take the place of

D.In place of

A. Unless

B. If

C. Because

D. Provided

A. Unless

B. If

C. Because

D. Provided

A. Must he have

B. Might he have

C. Had he

D. Should he have