The government has to close those small factories to prevent the water of the river___.
| A．from polluting | B．polluted | C．polluting | D．being polluted |
We have to give the users something new ________ what we’ve already offered, which is the only way to broaden the appeal of the website.
| A．regardless of | B．in addition to |
| C．in exchange for | D．according to |
We have a high regard for Mr. Black because he always tries to ________ his principles.
| A．live up to | B．look forward to |
| C．catch up with | D．put up with |
Only latelyabout the dark secrets behind the seemingly-happy
marriage of the golf star Tiger Woods.
| A．the public have known | B．were the public known |
| C．have the public known | D．the public knew |
—I phoned you at 7 yesterday evening but nobody answered.
— Oh, I ______ my dog in the park then.
| A．walked | B．was walking | C．had walked | D．would walk |
So far all cloned animals have suffered from some different serious disorders, ______ dying soon after birth.
| A．many of which | B．many of whom | C．many of them | D．many of that |