高一英语适当时态填空,
BytheendofJuly,1969,theAmericangovernment（）(pay)over$5billiononthespaceprogramme.Humankind（）(not,have)anyothergreaterprojectthanProjectApollo.
Landingonthemoonrequiresalotoftimeandeffort.Scientistsandengines()(work)hardsincetheybegantodesignthespaceship.TheymadefivesetsofplansfortheMoonlanding.Theyhadintendtosendaspaceshipweighing150000poundsdirectlytothemoon.
Butthemeanthumans()(land)onthemoonmanyyearslater.Americans()(not,spend)muchmoremoneyandwaitforyearstobuildahugerocket.They()(send)fivepartsofaspaceshipintospacewiehfivesmallerrockets.Engineersontheground()(have)thefiveseparateparts"meet"inspace.Butthere()(be)seriousproblemsifthefivepartsfailedtocometogetheratthesametime.Atlast,NASAdecidedtoadoptaplansuggestbyanengineernamedEagle()(separate)fromApolloandlandontheMoon.
Apollo()(leave)fortheMoonsoon.Andanexcitingday()(beaboutto,come)