閱讀下面短文，掌握其大意，從每題所給的A、B、C、D四個選項(xiàng)中，選出最佳選項(xiàng)。

My husband, Tom, has always been good with animals, but I was still amazed when he befriended a female grouse (松雞)．It's impossible for a grouse to have any contact (接觸) with people．In fact, they're hard to spot, they usually fly off when they hear humans approaching.

This grouse came into our lives in ．Tom was working out in the field when he her walking around at the edge of the field．She was unafraid and seemed to be curious about what he was doing.

Tom saw the bird several times, and she got more comfortable around him．We quickly grew .of the bird and decided to call her Mildred.

One day, as Tom was working, Mildred came within a few feet of him to watch．Tom he didn't see her and kept working to see what she would do next.

Apparently, she didn't like to be ignored．She'd run up and peck (啄) at Tom's hands, then off to see what he would do．This went on for about 20 minutes, until Mildred became tired of the .and left.

As spring went and summer came, Mildred started to more and more often． Mildred felt comfortable enough to jump up on Tom's leg and stay long enough for me to get a picture of the two of them together．This friendly grouse soon felt not just with our family, but with anybody who walked or drove by.

When hunting season opened, we put a at the end of our driveway asking not to shoot our pet grouse．My father, who lived down the road, warned people not to shoot her．In fact, hunters would stop and take pictures, because they had never seen anything like her.

1.A．though B．because C．unless D．until

2.A．spring B．summer C．a(chǎn)utumn D．winter

3.A．got B．kept C．noticed D．imagined

4.A．naturally B．certainly C．normally D．surprisingly

5.A．shy B．a(chǎn)wkward C．friendly D．elegant

6.A．careful B．tired C．fond D．sick

7.A．supposed B．realized C．hoped D．pretended

8.A．put B．back C．set D．take

9.A．game B．work C．place D．man

10.A．give up B．come out C．turn over D．fly by

11.A．Eventually B．Suddenly C．Constantly D．Presently

12.A．comfortable B．guilty C．a(chǎn)nxious D．familiar

13.A．lantern B．sign C．gun D．loudspeaker

14.A．drivers B．farmers C．hunters D．tourists

15.A．just B．yet C．thus D．a(chǎn)lso

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Exercise seems to be good for the human brain，with many recent studies suggesting that regular exercise improves memory and thinking skills．But an interesting new study asks whether the apparent cognitive benefits from exercise are real or just a placebo effect — that is，if we think we will be “smarter” after exercise，do our brains respond accordingly？The answer has significant implications for any of us hoping to use exercise to keep our minds sharp throughout our lives．
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