We must [ ] at the door before we do into the teacher's offi
We must [ ] at the door before we do into the teacher's offi
You should ( )on the door before you go into the teacher‘s o
We should k____at the door before entering.
Before we dive into the animations,we should look at whether
we must s( ) the earth
We make it a rule to knock at the door before you come in.I
In class ,we must listen to the teacher and look at the b___
单词拼写in the lab you must follow your teacher's i___ before do
--we must call the doctor.--yes,we must .[do]
we should never wait for the door to open before
When the teacher goes into the classroom,we s() playing game
Must we finishe the work before five?No,you ___.You can do i