1, rewrite these sentences without changing the meanings
1, how long have they waited for the doctor ?
=> how long................................................................................................................................
2, what time can they boys hand in the papers ?
=> what time.........................................................................................................
3, what books are people reading this year?
=>.......................................................................................................................................................
4,professor brown is teaching that course this semester.
=> that course..............................................................................................
5, who are they keeping in the kitchen?
=>.............................................................................................................................................
1.How long has been the doctor waited?
