We've got two TV sets, but we still can't watch anything because ______ works properly.
| A．neither | B．either | C．each | D．none |
Mr Brown and his wife expect that by the year 2015 they __________ in Beijing rather than in other cities.
| A．are living | B．will be living | C．have lived | D．will have lived |
A ___________ identification card is required when you purchase foreign money from the Bank of China.
| A．valid | B．fruitful | C．beneficial | D．effective |
The observations which he reported __________ marketing bothered his boss a lot.
| A．being concerned | B．concerned | C．be concerned | D．concerning |
Remember when you learned to water ski, David? _________ you skied more, you got better and better. It’s the same with language study.
| A．although | B．while | C．as | D． unless |
________ over everything whenever we want to make a decision, many people believe, and we will have less chance of making mistakes.
| A．To think | B．Think | C．Thinking | D．Thought |