________ with so much trouble,we failed to complete the task on time.
This is a process happens when land becomes desert people cut down trees and dig up grass.
The director thought I was referring to her,in fact, I was referring to the men on duty.
With several students , Mr. Smith came into the lab.
I couldn’t fall asleep. Every night the house as heavy trucks went past.
While working in the countryside, the students a great deal of knowledge on plant life.