she will sing a song____she is asked.A.if B.unless C.for D.since 请问选哪一个 为什么呢? 谢谢

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she will sing a song____she is asked.A.if B.unless C.for D.since 请问选哪一个 为什么呢? 谢谢
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she will sing a song____she is asked.A.if B.unless C.for D.since 请问选哪一个 为什么呢? 谢谢
she will sing a song____she is asked.
A.if B.unless C.for D.since 请问选哪一个 为什么呢? 谢谢

she will sing a song____she is asked.A.if B.unless C.for D.since 请问选哪一个 为什么呢? 谢谢
if
原因不太好说,语感是if
unless
应该这样说：she wouldn't sing a song ,unless she were asked.
for since
应该这样说：she sung a song,for/since she had been asked.

She will sing a song语法正确么 She will sing a song if she is asked为什么用if引导 she wants to sing a song I'will sing a song to you she wants to sing a beautiful song怎么问 -------is beety -----(do)now she-------(sing)a song will you sing a song for us?改为同义句 I will sing a song 改成一般疑问句怎么改? Are you ------ （will）to sing a song for them? Sing A Song 歌词 sing a song sing a song是什么意思 sing a song是什么意思 will you please _________ a song for us tonight?A.singing B.to sing C.sing She would like ( ) an English song. A sing B singing C to sing she wants to sing a song对 sing english songs提问 The teacher is good at ___(sing).She ___(sing)a song just now. 连词成句sing,her,will,an,English,song,week,classmates,she,for,next