At the beginning of class, the noise of desks ____ could be heard outside the classroom.
举一反三
- At the beginning of the class,the noise of desks ________could be heard outside the classroom. A: opened and closed B: to be opened and closed C: being opened and closed D: to open and close
- The noise of the desks _____ could be heard in the next classroom. A: being opened and closed B: opened and closed C: having been opened and closed D: to be opened and closed
- I heard the noise and went to see ________ in the classroom.（发生了什么）
- 中国大学MOOC: Nancy shut the windows right after she heard the noise for fear that the noise outside would distract her children ___their homework.
- In the flipped classroom the students should ( ). A: first face to new material inside of class B: first face to new material outside of class C: do the easer work in classroom D: do the harder work in classroom