Astheplanecircledovertheairport，everyonesensedthatsomethingwaswrong.Theplanewasmovingunsteadilythroughtheair，andalthoughthepassengershad(11)theirseatbelts，theyweresuddenly(12)forward.Atthatmoment，theair-hostessappeared.Shelookedverypale，butwasquitecalm.(13)quicklybutalmostinawhisper，sheinformedeveryonethatthepilothadfaintedandasked(14)anyofthepassengersknewanythingaboutmachinesoratleasthowtodriveacar.(15)amoment'shesitation，amangotupandfollowedthestewardess(空中小姐)intothepilot'scabin.
Movingthepilotaside.themantook(16)andlistenedcarefullytotheurgentinstr uctionsthatwerebeingsentbyradiofromtheairport(17).Theplanewasnowdangerouslyclosetotheground，buttoeveryone'srelief，itsoonbegantoclimb.Theman(18)circletheairportseveraltimesinordertobecomefamiliarwiththecontr ols.
Followinginstr uctions，themanguidedplanetowardstheairfield.Itshook(19)asittouchedthegroundandthenmovedrapidlyacrossthefield，butafteralongrunitstoppedsafely.Outside，acrowdofpeoplewho(20)anxiously，rushedforwardtocongratulatethe“pilot”onaperfectlanding.
A.installed
B.fastened
C.connected
D.held
正确答案：B[解析]安全带被扎紧，用fasten：扎牢，扣紧。
