—Those scientists invented a robot to care for kids! —It’s not surprising.They _

—Those scientists invented a robot to care for kids! —It’s not surprising.They _

题型:不详难度:来源:

—Those scientists invented a robot to care for kids!
—It’s not surprising.They ____ wonders all the time.
A.workedB.were workingC.workD.have been working

答案
D
解析
考查时态。句意:这些科学家发明了一个机器人来照顾孩子。——不奇怪。他们一直在创造奇迹。可知下文描述的是现在已经完成的过去一直在进行的动作,故用过去进行时态。选D。
举一反三

Either the ways or the time ____ yet, but you may ask the headmaster for some information.
A.isn’t decidedB.hasn’t decidedC.aren’t decided D.haven’t decided

题型:不详难度:| 查看答案

_______ , the girl worked in a hurry.
A.Having swept the roomB.Another room swept
C.Having another room to sweepD.Having another room to be swept

题型:不详难度:| 查看答案

______ the plan means we must start from the very beginning.
A.AbandonedB.AbandoningC.Being abandonedD.Having abandoned

题型:不详难度:| 查看答案

.—Remember the first time we met?
—Sure.You ____in the supermarket.
A.shoppedB.have shoppedC.had shopped D.were shopping

题型:不详难度:| 查看答案

The rest of the apple _________.
A.were throwing awayB.was throwing away
C.were thrown awayD.was thrown away

题型:不详难度:| 查看答案
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