Itwasnotuntildawn__________thesnowcappedpeakintheremoteareainTibet.
A.that they sighted B.did they sight C.that they did not sight D.had they sighted正确答案A
Itwasnotuntildawn__________thesnowcappedpeakintheremoteareainTibet.
A.that they sighted B.did they sight C.that they did not sight D.had they sighted正确答案A