Jealousy can expose romantic partners to extreme danger. It can (1) . previously harmonious relationships and can shatter (2) in a simple crashing moment. Anyone who’s read Shakespeare’s tragedy Othello--about a man so blinded by jealousy (3) he kills his wife--knows this. But as it (4) , being blinded isn’t purely metaphorical: jealousy can, literally, make us unable to see.

New research found that women who were made to feel jealous of their partners (who were also present) became so (5) by the emotion that they were unable to (6) visual targets on a computer screen. "The language of social relationships is filled with visual metaphor," write the psychology professors Steven Most and J. Laurenceau, but "the (7) of social emotions--known to affect moods, behaviors and physical health-- appears to (8) so deeply as to affect processes (9) in visual awareness."

That visual awareness involved the female members of 25 couples, (10) 19 to 20 in age, sitting near their partners at two (11) . computer screens. (12) the men looked at a series of photos that included graphic pictures of women and were asked to (13) their attractiveness, the women were (14) with pointing out landscape images (the "targets") (15) rapid streams of images. The result The more jealous the women became, the (16) they were distracted by the images on their partner’s screens, the less they could see the targets on their own screens.

So, what about male jealousy Well, the researchers didn’t test the men-at least not yet. But, (17) culture tells us anything, we’d guess the results won’t be much (18) . Until then, say the researchers, lovers, poets, and philosophers will continue to (19) whether love is blind--but we can all rest (20) that jealousy is.

Read the following text. Choose the best word (s) for each numbered blank and mark A, B, C or D on ANSWER SHEET 1.17（）

A．as

B．because

C．when

D．if