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Togettothetopofthemountain,wehadto.A.gosomewalkingB.doalotofclimbingC.walkingalongwayD.doingalotofclimbing

题目详情
To get to the top of the mountain, we had to _______.
A.go some walking   B.do a lot of climbing
C.walking a long way D.doing a lot of climbing
▼优质解答
答案和解析
B

have to后面跟动词原形。