This approach, ______ more expensive than the basic one, provides us with considerably more usage flexibility.
| A．as | B．since | C．while | D．if |
(2013·浙江，11)Half of ________ surveyed in 16 countries say they go first to their closest friend to share their deepest wishes and darkest fears.
| A．these | B．some |
| C．ones | D．those |
Recycling is one way to protect the environment; reusing is ________.
| A．another | B．the other |
| C．one another | D．one |
The project requires close teamwork. ________ will be achieved unless we work well together.
| A．Nothing | B．Anything |
| C．Something | D．Everything |
(2013·全国Ⅱ，14)It's an eitheror situation—we can buy a new car this year or we can go on holiday but we can't do ______.
| A．others | B．either |
| C．another | D．both |
They put forward a lot of plans at the meeting, none of________ carried out in their work.
| A．which | B．what | C．that | D．them |