In manufacturing, cheaper materials are constantly being for the better, more expensive kind.
| A．maintained | B．cancelled | C．substituted | D．deposited |
---- If he had been warned, he ______ that food yesterday.
---- Luckily he was sent to the hospital immediately.
| A．would not take | B．would not have taken |
| C．had not taken | D．didn’t take |
The approach ______ the problem is contrary ______ our expectation.
| A．to; to | B．of; to | C．to; on | D．for; on |
What ______ me was that there was a ______ look on her face due to the ______ problem.
| A．confuses; confusing; confusing |
| B．confused; confused; confused |
| C．confused; confused; confusing |
| D．confused; confusing; confusing |
Our country ______ great changes in the last 30 years and it is no longer it used to be.
| A．went through; what | B．went through; that |
| C．has experienced; that | D．has experienced; what |
Every student as well as teachers who ______ to visit the museum ______ asked to be at the school gate on time.
| A．is; is | B．are; are | C．is; are | D．are; is |