YouthatlettertoJames.However,yodidn't().
B
「句意」 你本应该给詹姆斯写信,然而,你没写。
「难点」 ought to have written 是虚拟语气,与本句句意相符。
TheBentPyramidoutsideCairo__________ancientEgypt’sfirstattempttobuildasmooth-sidedpyramid.
John'sscoreonthetestisthehighestintheclass;he____lastnight.
Evenifhisletter____tomorrow,it____toolatetodoanything.