It is in their ability to speak ________ humans ________ from animals.
| A．which；differ | B．that；different | C．which；different | D．that；differ |
After describing the planned improvements， she went on _____ how much they would cost.
| A．to explain | B．explaining |
| C．to be explaining | D．having explained |
_____ wherever you go is the price you pay for being famous.
| A．Being recognized | B．To recognize |
| C．Recognizing | D．Having recognized |
To test eggs，_____ them in a bowl of water： if they float they’re bad， if they sink they’re good.
| A．put | B．putting | C．to put | D．to be putting |
Before you decide to leave your job，_____ the effect it will have on your family.
| A．consider | B．considering | C．to consider | D．considered |
Children should be encouraged _____ up outside interests， such as music or sport.
| A．to take | B．taking | C．to have taken | D．having taken |