Question

when they are four or five years old=......... 同义句转换

when they are four or five years old=.........
同义句转换

Answer 1

at the age of four or five
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追问

1.David wakes up at 8 o'clock every morning.
=David sleeps ------ 8 o'clock every morning.
2.lf you like a book here,you can borrow it.
=You can borrow -------- ------------ ----------- --------------- here

追答

until,a book you like

Answer 2

when they are four or five years old=at the age of four of five

追问

.David wakes up at 8 o'clock every morning.
=David sleeps ------ 8 o'clock every morning.

追答

David wakes up at 8 o'clock every morning.
=David sleeps till/until 8 o'clock every morning