We must ______ that the experiment is controlled as rigidly as possible.
更新时间:2024-11-24 10:02:13 A、assureA
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It________asashocktorealizethatIwasnotaloneintheroom.
Theboyranoutoftheclassroomwithouttheteacher's_______.
________theconcerthadbegundidwerealizewhatasplendidshowitwasgoingtobe.
SinceWilliamhadbeenseriouslyillforseveralmonths,hisparentswereworriedabout________toreturntoschoolfull-time.
Aftersomanydayswithoutrain,thegroundquickly________thelittlerainthatfelllastnight.
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