토익문제 Q&A 글쓰기

ㅠㅠ모르겠습니다..해커스
영어 | 2015.08.20 | 조회 403
Business at resturant --- to improve once the advertising campaign launches.

will begin
beginning
Has begun
Began
중에 첫번째가 답인데 저는 문장을보고 once를 보고 과거시제인줄알고 began을선택했네요 이문제는 해석으로 해야하는건가요? 저처럼once만보고 선택하려면 어떤문제여야하는지요ㅠ..


Please make sure that the packages---sent to the trade fair in Beriln are ready by Friday.
To be
Was
Are
Have been
중에 첫번째인 to be가 답인대요
Are를 선택햇는대 저는..이문제는 어떻게풀어야하는지요..?

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