By this time tomorrow ,I bet the contract___ A has been prevented_英语解答

By this time tomorrow ,I bet the contract___ A has been prevented B will have been signed
C is signed D will be signed请说明理由

人气：244 ℃　时间：2019-09-22 07:18:18

解答

B为什么由tomorrow可知时间是将来，再有by后接时间，可知要用完成时，所以综合起来就要用将来完成时不好意思啊，答案是D我还是认为答案应该是B