Email, as well as letters, ___________ an important part in daily communication..
I’m not a teacher in this school.I _____ until a new teacher arrives.
The scientists are urging that the chemical _____.
“Changes should be made in the prison for the conditions there are _____,” said the reporter.
Mr.Smith was very glad _____ as the manager of the company.
---Have you received Jack’s plan? ---Yes, but I don’t think his plan is _____.