空所に入れるのに最も適切な語句を，下の①～④から一つずつ選びなさい。
(1) We ( ) go to school tomorrow because it is a holiday.
①don't have to ②have not ③have to not ④ought not （京都産業大）
(2) The newspaper ( ) be delivered by 7 o'clock in the morning. Otherwise I can't read it before leaving for the office.
①would ②should ③might ④could （神奈川大）
(3) The wind was not ( ) to prevent us from sky-diving.
①so strong ②as strong as ③so strong as ④as strong （センター試験）
解答は、解説解答編で