Bài 4: Change these yes-no questions into passive voice:
1. How did the police find the lost man?
=>.............................................................
2. How long have they waited for the doctor?
=>...............................................................
3. How many marks does the teacher give you?
=>......................................................................
4. Who lend you this book?
=>.........................................
(MONG CÁC BẠN GIÚP MÌNH NHA)