________ confidence in yourself is the biggest barrier _______ greater progress in your work.
| A．Lacking of; to making | B．Lack of; to make |
| C．Lack of; to making | D．The lack of; to make |
This washing machine is environmentally _______ because it uses less water and electricity than older models.
| A．friendly |
| B．various |
| C．common |
| D．changeable |
AII the companies had to _______ their expenses in response to the financial crisis.
| A．add up to |
| B．cut back on |
| C．look out for |
| D．refer back to |
In the new term,I'd like you to know the three different _______ to the study of math.
| A．approaches |
| B．means |
| C．methods |
| D．ways |
As you know, the output of cars in 2010 is five times _______ it was in 2000 in the factories across our country.
| A．which |
| B．that |
| C．how |
| D．what |
_______ medical issues, we also have to face moral and legal issues when cloning human beings.
| A．Regardless of |
| B．As a result of |
| C．In addition to |
| D．Except for |