The new hotel __________ a brisk trade during

【問題】
The new hotel __________ a brisk trade during the summer, but business has declined during the fall.

【選択肢】
1.　is done
http://jibun.atmarkit.co.jp/scenter/ittrain/93_20070816_a1.html

2.　is doing
http://jibun.atmarkit.co.jp/scenter/ittrain/93_20070816_a2.html

3.　had done
http://jibun.atmarkit.co.jp/scenter/ittrain/93_20070816_a3.html

4.　was doing
http://jibun.atmarkit.co.jp/scenter/ittrain/93_20070816_a4.html

問題提供：リアル・イングリッシュ・ブロードバンド株式会社
http://jibun.atmarkit.co.jp/misc/ct.php?id=TR56_RE1
No.09320070816