Sincewehaveafocusedsubject,weshouldnottalk________.
A、atonceD
译文:既然我们已经有了命题, 我们就不应漫无边际地交谈。 此题考查对固定短语的掌握情况。 at once 立刻; at hand在附近,在手头,即将发生; at intervals 间或,不时; at random 随便,任意。
Although Tom is satisfied with his academic achievement,he wonders _______ will happen to his family life .
Duringthepasttwodecades,researchhas________ourknowledgeofdaydreaming.
Anxietycan________withchildren’sperformanceatschool.
The outline of rooftops and chimneys ________ against the pale sky.
When_______,waterwillbeturnedintosteam.