C.Because it can lead to information to get rid of sea parasites.

　　D.Because it can improve the marine environments for marine animals.

　　Ⅱ.完形填空

　　(2015·河北邢台高三摸底)

　　My 13-year-old son and I had quite the adventure this morning!We frequently passed by a 　1　 landscaped yard with a nice little flower garden.I wanted to 　2　 my thanks for the time and effort put in by the 　3　,but I’ve never seen him or her,so we went to a local nursery and bought a gift card that I would leave with a 　4　 and a smile card the next time that I passed by. 

　　We also ran to Walmart and　5　 a few $10 gift cards along with some note cards and our other 　6　.While we were putting our things away in the car,my son 　7　 that a lady that had just parked next to us looked a little 　8　.As soon as she entered the 　9　,we grabbed a note card,made a note 　10　,and added a gift card for her to find when she got back to her 　11　,hoping to comfort her feelings. 

　　After that,we went for a(n)　12　breakfast.The restaurant was pretty 　13　 and the people working in the kitchen seemed to be busy forever.A young couple 　14　 across the dining table from us was having some trouble with their 　15　,who looked to be about four or five.He grew 　16　and impatient with the wait and they had their hands 　17　 keeping him from making troubles. 

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