HenryFord'sintroductionoftheassemblylinevastlyreducedthetimeittook___
AtomakeacarBmakingacarCformakingacarDwhilemakingacar
Theyaregoingtohelp____thetrees.
AwateringBwaterCwateredDwhilewatering
Sheisgoingtotown____
AtorepairherwatchBtohaverepairedherwatch
CtohaveherwatchrepairedDforrepairingherwatch
Scientiststhinklaser____oneofthemostusefultoolsinusetoday
AbeingBtobeCasbeingDbe
"Iamhungryandiwanttoeatthebread."
What!Itisnotgood___
AforeatingBtobeeatenCtoeatDeating
Thepoliceinspectorspoketothelittlegirlkindly____her.
AnottofrghtenBinordertonotfrighten
CsoasnottofrightenDfornotfrightening
________,theywentswimming.
ABeingahotdayBItwasahotday
CDuetoahotdayDThedaybeinghot
(以上题目,希望高人能给出一一解释,我会加分的,