—Can those ____ at the back of the classroom hear me?---No problem.
A modern city has been set up in _____ was a wasteland a few years ago.
The boss commanded that the task ______ before 5 o’clock this afternoon.
Every chance should be made use of ______ English.
I don’t like ______ you speak to her.
The number of the teachers who ______ cars in our school ______ increasing very fast.