John'sscoreonthetestisthehighestintheclass;（）helastnight.
A、muststudyC
「句意」 約翰的考試分數全班最高;他昨天晚上一定學習了。
「難點」 表示對過去某一動作行為的猜測須要用must have done 這一句型結構。
U.S. News ____________ rankings of colleges since 1983. They are a very popular resource for students looking to apply to university campus.
_____enoughtimeandmoney,theresearcherswouldhavebeenabletodiscovermoreinthisfield.
Thebackgardenofourhousecontainsalawn，（）verypleasanttositoninsummer.
His manner was so pleasant that Bolla felt at （）with him at once.
Arriving at the bus stop, _____ waiting there.
