请说明选与不选的原因,She still remembers the days _______ she spent in the countryside.A.while B.which C.when D.during which

请说明选与不选的原因,She still remembers the days _______ she spent in the countryside.A.while B.which C.when D.during which 请详细说明选A的原因 选什么请说明原因 选什么请说明原因 选哪个,请说明原因, To do the work more successfully,__ we need is more timeA.only whatB.all whatC.all thatD.only请说明不选与选的原因, she learns_____piano every afternoon a/an/the/不填,请说明原因 关于still用法（点开看题）,My friend has always been fat.He still _______ fat.A.is B.has been 我2个答案都觉得可以,请各位说明其中一个错误的原因.如果选A,顺便讲一下为什么always换成still就不用完成时了. 这题为什么不选C啊?选D的原因是什么呢?The police have been looking for the missing girl the whole week but she is still nowhere ____C.seen D.to be seen Some people are still strong and healthy___their 60s and 70s.( )A.in B.during C.for D.after这道题我选的是B,请说明一下B错的原因, does she wait for the bus?与 is she waiting for the bus 一样吗 如果不一样 请说明原因 1.2题,请说明选的原因,谢谢 The smile on her face suggested that she ______satisfied with her son's progress.A.should be B.would be C.was D.had been 请帮忙回答选与不选的原因. She left the boy [a.continuously b.continually]supplied with different kinds of food.同时请说明选择这个答案而不选择其他答案的原因, 应该选什么?为什么?请说明原因, KClO3与KI反应吗,若不反应,请说明原因；若反应,请写出生成物. 性激素的合成与内质网有关吗?请说明原因. 性激素的合成与内质网有关吗?请说明原因.