English Senior High over 7 yearsago

なぜ四番ではダメなのですか？答えは2番です。

The ground is muddy. Tt ( ) last night ⑥⑯ must berained @had to rain mustrain @ must have been raned must have rained (関東学隊大) 1 James missed the train he was going to take.、 He should ( ) home earlier. leave haveleft beleaving havebeen left (静岡県立短大)