30.Cancerissecondonly_B_heartdiseaseasacauseofdeath.
32.Themanagerneedsanassistantthathecan_A_totakecareofproblemsinhisabsence.[inhisabsence在某人不在场的情况下]
AcountonBcountinCcountupDcountout
presencen.到场，出席;inone’spresence在某人在场的情况下。
counton=dependon指望，依靠，依赖;countup算出总数;
countin把…算在内;countout把。..排除在外。
33.Theorganizationhadbrokennorules，but_A_haditactedresponsibly.
34.Wegaveoutacheerwhentheredroofofthecottagecame_D_view.
comeintoview进入视野，进入眼帘。cheern.欢呼;cheers干杯;
cheer-team拉拉队;cheer-leader拉拉队长。英语中为了…干杯用介词to引起。
toyourhealth为了你的健康干杯;tofriendship为了友谊干杯。bottomup先干了。
35.Theytook_D_measurestopreventpoisonousgasesfromescaping.
AfruitfulBbeneficialCvalidDeffective
takeeffectivemeasures采取有效措施。validadj.有效的，成立的。
36.Doingyourhomeworkisasurewaytoimproveyourtestscores，andthisisespeciallytrue_A_itcomestoclassroomtests.
sure做定语时表示“可靠的、稳妥的”。cometo谈到，提及。
37.Carefulsurveyshaveindicatedthatasmanyas50percentofpatientsdonottakedrugs_D_directed.
drugn.药品，毒品。gayadj.放荡的，快乐的;n.同性恋者，尤指男性同性恋。
so后面加过去分词表示一种程度。as后面加过去分词时表示“如同…那样，正如…那样”。
53.Ihopealltheprecautionsagainstairpollution，_D_suggestedbythelocalgovernment，willbeseriouslyconsideredhere.
precautionsn.防治措施;precautionsagainst防治…的措施。
afterbeing+过去分词，注意：after后面不能直接加过去分词。
38.Indevelopingcountriespeopleare_C_intoovercrowdedcitiesingreatnumbers.
AbreakingBfillingCpouringDhurrying
pourinto涌入，蜂拥而入。breakinto强行闯入。
39.It’sreportedthatbytheendofthismonththeoutputofcementinthefactory_A_byabout10%.[output产量]
AwillhaverisenBhasrisenCwillberisingDhasbeenrising
40.IfIhadremembered_A_thewindow，thethiefwouldnothavegotin.
AtocloseBclosingCtohaveclosedDhavingclosed
remembertodosth.记得要做某事但没做。
