A. know B. knew C. had known D. have known
A. will have come B. would have come C. have come D. had come
A. will set up B. have set up C. would have set up D. had set up
A. shouldn't B. can't C. mustn't D. needn't
A. missed B. would miss C. miss D. will miss
A. would visit B. will visit C. visit D. have visited
A. finished B. be finished C. should finish D. finish
A. Bob had walked farther B. if Bob should walk farther C. had Bob walked farther D. if Bob walked farther
A. we’ll B. we’d C. we’re going D. we went
A. don’t B. didn’t C. won’t D. mustn’t
微信支付 
支付宝支付