You____that letter to James. However ， you didn't.
A、oughttowriteB
「句意」你本應該給詹姆斯寫信，然而，你沒寫。
「難點」oughttohavewritten是虛擬語氣，與本句句意相符。
Marytiptoedoverandtooktheclockawaybecauseshehatedtohearit（）whenshewastryingtogotosleep.
_____ your timely advice,I would never have known how to go about the work.
Modern（）perhapscausesmoreproblemsthanitsolves.
Frank almost never received any education,____?
Prices have recently risen in order to __________ the increased cost of raw materials.
