If the operation ________ carefully prepared, it would not have been successful.
A、wasnotC
語法題：虛擬語氣。
Decisiononwhetherthemessageisrightorwrongshouldatleastcomeafter_____whatthemessageis.
Themeeting_____nextweekwillbeofgreatimportance.
Jennycomplainedthatthehospital________hertoomuchforthetreatment.
Hewas______towithdrawfromrunningforthepresidency.
Notuntilrecently_____thatThompsonhadbentellingthetruthallalong.
