If the operation ________ carefully prepared, it would not have been successful.
A、wasnotC
语法题：虚拟语气。
Decision on whether the message is right or wrong should at least come after _____what the message is.
Aftermonthsofvoyage,Columbusarrivedin______laterprovedtobeanewcontinent.
Thebookfairhasreceivedapositive________fromreaders.
Itrainedhardyesterday,______preventedmefromgoingtothepark.
Is it Shakespeare Theatre _______ you are going to watch the play The Merchant of Venice?
