Not until _____,_______the diffiult problem.
A.did he return;we settled | B.he returned;we settled |
C.did he return,did we settle | D.he returned;did we settle. |
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Not until _____,_______the diffiult problem.
A.did he return;we settled | B.he returned;we settled |
C.did he return,did we settle | D.he returned;did we settle. |