问题标题：
【1.Heaskedme_____Iwouldlikeacupoftea.A.thatB.whatC.if2.Thestudentscouldn'thelp______whentheyheardthejoke.A.tolaughB.laughC.laughing3.Mrs.Sunisafriendof_______.A.Mary'smotherB.motherofMaryC.Mary'smother's并说下为】
问题描述：
1.Heaskedme_____Iwouldlikeacupoftea.
A.thatB.whatC.if
2.Thestudentscouldn'thelp______whentheyheardthejoke.
A.tolaughB.laughC.laughing
3.Mrs.Sunisafriendof_______.
A.Mary'smotherB.motherofMaryC.Mary'smother's
并说下为什么要这样做.答的好,
沙赫德回答：
C,这里的If不再是如果的意思,而是是否的意思
C,在when的前面是用一般现在进行时
A,afriendof意思是和某某人是朋友,Mary'smother就是Mary的妈妈,连起来就是Mrs.Sun和Mary的妈妈是朋友
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