21、Animals do not “talk” with words. They use smells, sounds and movements to communicate with ____ animal.
| A．any other | B．another | C．each other | D．the other |
As we all know ,every minute, full use of our lessons ,will do good to our students.
| A．which makes; studying | B．when made; to study |
| C．that is made ;study | D．that is made ;studying |
Without electronic computers ,much of today’s advanced technology .
| A．will not have been achieved | B．have not been achieved |
| C．would not have been achieved | D．had not been achieved |
At present the hotel is almost empty ,but I’m sure things will start to in the spring.
| A．rise up | B．hold on | C．pick up | D．hang out |
－How much shall I pay for the phone call?
－You __________. This is free of charge.
| A．shouldn’t | B．can’t | C．needn’t | D．mustn’t |
Mike didn’t notice Alice entering his room. He __________ a phone call.
| A．answered | B．has answered | C．was answering | D．is answering |