Viết lại câu với các cấu trúc sau

Rewrite the following sentences with “It was not until ... that ...” (Viết lại câu với cấu trúc “It was not
until ... that ...”)
1. The cinema didn’t become an industry until 1915.
 ................................................................................................................................................... 2. The football match didn’t start until the lights were on.
 ................................................................................................................................................... 3. Mary didn’t work for this company until 2004.
 ................................................................................................................................................... 4. The boy didn’t do his homework until the teacher came back.
 ................................................................................................................................................... 5. He didn’t know how to swim until he was 30.
 ...................................................................................................................................................