You can actually catch a good mood or a bad mood from your friends，according to a recent study in the journal Royal Society Open Science．But that shouldn't stop you from （1）

C

C

with pals who are down in the dumps，say the study authors： （2）

A

A

，the effect isn't large enough to push you into depression．
    The new study adds to a growing body of research suggesting that happiness and sadness-as well as lifestyle and behavioral factors like smoking，drinking，obesity，fitness habits and even the ability to concentrate-can （3）

D

D

across social networks，both online and in real life．But while many （4）

B

B

studies have only looked at friendship data at one point in time，this is one of the few that measured social and mood changes over time．
    The new research involved groups of junior-high and high-school students who took part in （5）

A

A

screenings（篩查） and answered questions about their best friends，many of whom were also enrolled in the study．In total，2，194 students were included in the （6）

C

C

，which used a mathematical model to look for connections among friend networks．
   Overall，kids whose friends suffered from bad moods were more （7）

D

D

to report bad moods themselves-and they were less likely to have improved when they were screened again six months to a year later．When people had more happy friends， （8）

C

C

，their moods were more likely to improve over time．
   Some symptoms related to depression-like helplessness，tiredness and loss of interest-also seemed to follow this （9）

B

B

，which scientists call "social contagion．" But this isn't something that people need to （10）

A

A

，says lead author Robert Eyre，a doctoral student at the University of Warwick．Rather，it's likely just a " （11）

B

B

empathetic response that we're all familiar with，and something we recognize by common sense，" he says．In other words，when a friend is going through a rough patch，it makes sense that you'll feel some of their （12）

D

D

，and it's certainly not a reason to stay away．
   The study also found that having friends who were clinically depressed did not （13）

C

C

participants' risk of becoming depressed themselves． "Your friends do not put you at risk of illness，" says Eyre， "so a good course of action is simply to （14）

D

D

them．" To boost both of your moods，he suggests doing things together that you both （15）

A

A

-and taking other friends along to further spread those good feelings，too．"

（1）	A．keeping up	B．making off	C．hanging out	D．getting away
（2）	A．Thankfully	B．Particularly	C．Hopefully	D．Totally
（3）	A．increase	B．generate	C．delay	D．spread
（4）	A．growing	B．previous	C．real	D．large-scale
（5）	A．depression	B．a(chǎn)nxiety	C．a(chǎn)nger	D．friendship
（6）	A．a(chǎn)ssessment	B．examination	C．a(chǎn)nalysis	D．exercise
（7）	A．willing	B．reluctant	C．a(chǎn)ble	D．likely
（8）	A．what's worse	B．a(chǎn)s a result	C．on the other hand	D．in one word
（9）	A．prediction	B．pattern	C．report	D．improvement
（10）	A．worry about	B．look for	C．rely on	D．put forward
（11）	A．social	B．normal	C．rough	D．certain
（12）	A．symptoms	B．responses	C．recognition	D．pain
（13）	A．eliminate	B．conceal	C．increase	D．sugarcoat
（14）	A．enlighten	B．entertain	C．empower	D．support
（15）	A．enjoy	B．understand	C．a(chǎn)dvise	D．permit