A good teacher must be able to hold his students’ attention ____ he reaches the end of the class.
| A．when | B．after | C．until | D．unless |
Don’t hurry me. One more minute, _______ I will solve this problem.
| A．or | B．so | C．but | D．and |
--It’s a lovely day, isn’t it?
--Yes. I love _______ when the weather is like this.
| A．this | B．that | C．it | D．one |
This is a very convenient place to live in,is an airport connecting all the big cities.
| A．20 km northwest of it | B．20 km northwest of which |
| C．northwest 20 km to it | D．northwest 20 km of which |
competence, you are quite suited to the position, but you shouldn’t be careless.
| A．On account of | B．In spite of | C．In terms of | D．By means of |
Whoever is new in the community will soon to the new environment, as everybody here is friendly and helpful.
| A．apply | B．appeal | C．attach | D．adapt |