句型转换。
I will go to bed when I finish writing the letter.
I _______ go to bed _______ I finish writing the letter.
John was busy at 9 last night. He was writing his English composition at 9 last night.
John _______  _______  ________ his English composition at 9 last night.
The old man was too tired to walk on.
The old man was _______ tired _______ he couldn’t walk on.
Mike is the tallest in his class.
Mike is taller _______  ________  ________  ________ in his class.
It’s about half an hour’s walk.
It takes about half an hour to go there _______  ________.
Work hard, and you will get good marks.
_______  _______ work hard, you’ll get good marks.