Sorry I'm so late, but you cannot imagine __________ great trouble I took to find your house.
| A．what | B．how | C．which | D．why |
Los Angeles Times reported that researchers may have found a way to ______ human life by changing certain genes, so that humans might expect to live twice as long.
| A．extend | B．preserve |
| C．multiply | D．transform |
A 19-year-old teenager from Guangdong nicknamed Niko demanded an apology from Youku, which he believed violated their copyrights as it used his team's photos without ______.
| A．commitment | B．approval |
| C．recognition | D．reservation |
Over the years, people have learned from ants that teamwork and perseverance are indeed two key ______ to success.
| A．certificates | B．ingredients |
| C．approaches | D．instructions |
The writer conveyed a positive attitude through his works.______, his readers are motivated and are themselves becoming a source of motivation for others.
| A．On the whole | B．In the meanwhile |
| C．In the way | D．On the contrary |
You are to meet with frustration in the pursuit of success and through greater effort and hard work your dream will definitely come true. Put it ______ , “No pains, no gains.”
| A．frequently | B．firmly |
| C．openly | D．simply |