Iftheoperation________carefullyprepared,itwouldnothavebeensuccessful.
A、wasnotC
語法題：虛擬語氣。
Itisimportantto________yourskinfromtheharmfulstrongsunlight.
The central theatre has a seating ________ of more than 3, 000 people.
Iftheoperation________carefullyprepared,itwouldnothavebeensuccessful.
Not until recently_____that Thompson had ben telling the truth all along.
Students should_____their own interests as well as do their schoolwork.
