紧急!高一英语单选.帮我解释下.
6_____inhisbook,hedidn'tnoticewhathadhappened.
ABuriedBBuringCTobeburyingDTobeburied
7Becauseofthe_____,wecan'tgohighuptothemountainswithouttheoxygentanks.
AsmellygasBcoldweatherChighaltitudeDfrozenwater
8Theladyinsistedthattheyoungman_____herwalletandinsistedon_____tothepolicestationatonce.
Ahadstolen,besentBshouldsteal,sendinghimChadstolen,hisbeingsent
Dshouldsteal,sending
9Itwasinthishouse______heheardsomestrangesounds.
AthatBwhereCinwhichDwhich
10.Whatreally_____mewasthatnooneseemedtocareabouttheoldmanlyingontheroad.
AinterestedBpleasedCexcitedDshocked