1.   Don’t you think we should ask the price? => Hadn’t.......................................................................................... ? 2.   Doris tiptoed up the stairs because she didn’t want to wake anyone up. => To ............................................................................... 3.   I’m sure it wasn’t Mr. Bill you saw because he’s in New York. => It can’t ....................................................................................... MỌI NGƯỜI LÀM VÀ GIẢI THÍCH TẠI SAO NHƯ THẾ GIÚP EM NHÉ NHÉ  EM XIN CẢM ƠN

1.   Don’t you think we should ask the price?

=> Hadn’t...............we better ask the price........................................................................... ?

2.   Doris tiptoed up the stairs because she didn’t want to wake anyone up.

=> To .................... avoid anyone waking up, Doris tiptoed up the stairs............................................................

3.   I’m sure it wasn’t Mr. Bill you saw because he’s in New York.

=> It can’t ................ have been Mr. Bill you saw because he is in New York........................................................................