You that letter to James. However ，yo 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。
Of course，（）most immigrants did not get rich overnight ， but the of them were eventually able to improve upon their former standard of living.
_____ at in this way, the present economic situation doesn't seem so gloomy.
Modern（）perhaps causes more problems than it solves.
U.S. News ____________ rankings of colleges since 1983. They are a very popular resource for students looking to apply to university campus.
_____ if I had arrived yesterday without letting you know beforehand.
