Tom's parents will be back from London _____.A.long before B.before long C.soon after为什么选B

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Tom's parents will be back from London _____.A.long before B.before long C.soon after为什么选B
Tom's parents will be back from London _____.
A.long before
B.before long
C.soon after
为什么选B

Tom's parents will be back from London _____.A.long before B.before long C.soon after为什么选B
因为will 是将来结构,你说的选项里只有b有将来时态的时间状语