13. By the end of last year we more than 2000 teachers of English all over the province .
It won’t be long before we _____________ a way to overcome the difficulties.
Whenthe future, many people will imagine a lifehigh-tech devices.
---Do you think he will do me a favor? ---As far as I know, he is the last one ___ others. He ___ be prepared to give you a hand, though.
As we all know, every minute _____ full use of ____ our lessons will do good to us students.
He had an accident ______ to work and was badly injured.