It was rather cold last night ,＿made it hard for me to fall

It was _____ (terrible) cold last night. it was necessary for him to go out last night 各路大侠,为什么Last night was too cold 是病句.而应该是Last night it was to It was ___ that made me ___ in the room last night I think it hard to fall asleep in night. It was so cold last night that they had to have the fire____ It was especially cold last night .是什 I should have made it as hard for me to leave you,as it now It was raining hard when I got home last night. I found it difficult to fall a_ last night I SHOULD HAVE MADE IT AS HARD FOR YOU TO LEAVE ME I found it hard to fall asleep at night.请问it后为什么不加is.