You should understand the traffic role by now. You've had it __________ often enough.
| A．explaining |
| B．to explain |
| C．explain |
| D．explained |
Her __________ feeling about him made him ____________.
| A．confused ; confusing | B．confusing ; confused |
| C．confused; confused | D．confusing; confusing |
Some people get in touch with each other by mobile phones__________ others keep contact with each other by e-mail.
A. while B. before C .when C. since
________ surprised the hostess most is _________ one of her friends left the party without saying a word.
| A．What, that | B．What, what | C．That, that | D．That, what |
The arrival of the European settlers had a great _________ on the life of the Native Americans.
| A．fault | B．change | C．impact | D．result. |
It was difficult to tell whether he could __________ our team and work for us for that situation?
| A．ask for | B．call for | C．wish for | D．stand for |