The pupils here_all kinds of exercises every day in the past four weeks.A. kept busy doing B.keep on doingC.have kept busy doing D.have been kept busy doing.选什么,为什么

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The pupils here_all kinds of exercises every day in the past four weeks.A. kept busy doing    B.keep on doingC.have kept busy doing  D.have been kept busy doing.选什么,为什么

The pupils here_all kinds of exercises every day in the past four weeks.A. kept busy doing B.keep on doingC.have kept busy doing D.have been kept busy doing.选什么,为什么
The pupils here_all kinds of exercises every day in the past four weeks.
A. kept busy doing B.keep on doing
C.have kept busy doing D.have been kept busy doing.
选什么,为什么

The pupils here_all kinds of exercises every day in the past four weeks.A. kept busy doing B.keep on doingC.have kept busy doing D.have been kept busy doing.选什么,为什么
选C.首先,这是主动语态,学生做各种练习,排除D;其次,keep on doing sth.表示的是继续做某事,而且此处时态是完成时(in the past four weeks),从这里就排除了B和A;表示完成时的标志性的状语还有since(加时间点)、for(加时间段),yet(一般用于疑问句和否定句中完成时),句中有时会有already和ever等状语

The pupils here_all kinds of exercises every day in the past four weeks.A. kept busy doing B.keep on doingC.have kept busy doing D.have been kept busy doing.选什么,为什么 The pupils here ______ all kinds of exercises every day in the past four weeks.A.kept busy doing The pupils here_all kinds of exercises every day in the past four weeks.A.kept busy doing B.keep on doingC.have kept busy doing D.have been kept busy doi The pupils ____ Park School are ___home the pupils ---------/9not have)english-------------(friend) We saw the pupils are playing football. WHERE ARE THE PUPILS OF PART SCHOOL the pupils --------(not have )english----------(friend) The pupils are in the park> (一般疑问句) The pupils should be p to the old people. Look!The pupils _____(eat) their lunch in the classroom. The teacher is telling some funny jokes () the pupils英语 The pupils can see a computer on the desk.(对a computer提问)________can the pupils _____________on the desk? All the pupils are on the playground now.All the pupils are in the playground now.那个介词对? yesterday was the__of__yesterday was Chinese tree planting Day.the pupils got together at the shool gate at____the pupils ____Guangming Farm by bus.First the pupils ____many___.then the pupils ___the ___with earth.And then the pupils___the ___pine tr There are some pupils in the classroom.变一般疑问句 pupils take the General Certificate of Secondary Education(GCSE) examination. The pupils want to buy some meat.改为一般疑问句 Three pupils were k___ in the school car accident.