This diploma ( 毕业文凭 ) ________ that you have completed high school.
B
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Onlywhenyouhaveobtainedsufficientdata________cometoasoundconclusion.
________ (fail) several times, they need some encouragement.
Heaskedmewhethermybrother________(fly)toBeijing.
Wooddoesnotconductelectricity;________.
Ipreferthisdiagram________thatone.