题目内容：

    In June 2019, Curtis Whitson and his family decided to go backpacking along central California's Arroyo Seco River. Things went _______ for the first two days. On June 16, Whitson, who was _______ with the area, led the trip to a waterfall in the Arroyo Seco narrows (峡谷).

Whitson had _______ to rappel (绕绳而下) down the side of a waterfall along the river. _______,when they reached the waterfall, Whitson realized that _______ his previous trip through the area, the water currents (水流) were too strong to pass. “My heart _______ when I realized that.” Whitson told CNN. To make matters worse, the rope was missing. Since going back the way they had arrived was _______ as well, they tried to _______other routes to get around it. But their _______ proved fruitless. With food running low and no cellphone reception to ________ help, he decided to carve a “GET HELP” message on the side of his water bottle and threw it across the waterfall in the ________ that someone would find it. Then they went back up the river to a small beach to ________ out for the night.

Sometime after midnight, the three adventurers were ________ by a welcome sound — a helicopter flying overhead. Since it was too dark to conduct a(n) ________, the officials asked them to stay warm for the night, and promised to ________ a team the following day.

Shortly after being ________, Whitson discovered that two hikers had tripped upon their water bottle and, upon seeing the urgent ________, reported the issue to the officials. Whitson says, “They didn’t ________ their name or phone number. They just did what was right in their heart, and most importantly they took it ________. The Whitsons hope the two good hikers will reveal their ________ so that they can express their gratitude in person.”

1.A.unexpectedly B.fortunately C.smoothly D.surprisingly

2.A.familiar B.satisfied C.busy D.patient

3.A.pretended B.planned C.asked D.refused

4.A.Meanwhile B.Besides C.Therefore D.However

5.A.as B.like C.unlike D.opposite

6.A.ached B.sank C.beat D.broke

7.A.uncomfortable B.unique C.available D.dangerous

8.A.seek B.create C.expand D.avoid

9.A.efforts B.thoughts C.directions D.situations

10.A.carry out B.give away C.pass on D.call for

11.A.challenge B.role C.hope D.course

12.A.camp B.come C.look D.run

13.A.recognized B.disturbed C.annoyed D.awakened

14.A.research B.inquiry C.rescue D.experiment

15.A.choose B.send C.develop D.train

16.A.kept out B.picked up C.turned down D.left alone

17.A.comment B.accident C.message D.story

18.A.notice B.leave C.remember D.bear

19.A.directly B.normally C.honestly D.seriously

20.A.identity B.motivation C.route D.secret