1.-how clean the window is!-yes.it[ ]just now.A has been cleaned B was cleaned2.-how clean the bedroom is!-yes i am sure that someone [ ]itA cleaned B has cleaned
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1.-how clean the window is!-yes.it[ ]just now.A has been cleaned B was cleaned2.-how clean the bedroom is!-yes i am sure that someone [ ]itA cleaned B has cleaned
1.-how clean the window is!-yes.it[ ]just now.
A has been cleaned B was cleaned
2.-how clean the bedroom is!-yes i am sure that someone [ ]it
A cleaned B has cleaned
1.-how clean the window is!-yes.it[ ]just now.A has been cleaned B was cleaned2.-how clean the bedroom is!-yes i am sure that someone [ ]itA cleaned B has cleaned
just now 是过去完成时的标志,故选B.
强调有人清理这件事,而非这个动作,且没有完成时的标志.故选A
1.-how clean the window is! -yes.it[ A has been cleaned ]just now.
A has been cleaned B was cleaned
窗户好干净！是的，刚刚清洁完。 是完成时态。刚刚完成，强调已经完成！选 A
2.-how clean the bedroom is! -yes i a...
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1.-how clean the window is! -yes.it[ A has been cleaned ]just now.
A has been cleaned B was cleaned
窗户好干净！是的，刚刚清洁完。 是完成时态。刚刚完成，强调已经完成！选 A
2.-how clean the bedroom is! -yes i am sure that someone [ A cleaned ]it
A cleaned B has cleaned
窗户好干净！是的，我确定有谁清洁它了。过去时，过去有人清洁它，没有强调是什么时候，也没有强调是什么时候完成。选B
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1.B.句子意思为：这扇窗户多么干净啊！-是的，它一定是刚刚被擦过的。just now意思是刚才，一般用在一般过去时当中。而单独一个just用在现在完成时态当中。
2.B.句子意思为：这间卧室多么干净啊！-是的，我确定有人打扫过。句式中语态为现在完成时，清扫”这个动作对现在产生了影响，对现在有影响。所以要用现在完成时...
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1.B.句子意思为：这扇窗户多么干净啊！-是的，它一定是刚刚被擦过的。just now意思是刚才，一般用在一般过去时当中。而单独一个just用在现在完成时态当中。
2.B.句子意思为：这间卧室多么干净啊！-是的，我确定有人打扫过。句式中语态为现在完成时，清扫”这个动作对现在产生了影响，对现在有影响。所以要用现在完成时
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第一题，a.运用完成时的被动语态。
第二题，a.过去式。