I haven't heard from my parents for a long time.Don't worry.Nothing ---to th---I haven't heard from my parents for a long time.Don't worry.----Nothing ---to them.A.has happened B.is happeningC.was happening D.happens
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I haven't heard from my parents for a long time.Don't worry.Nothing ---to th---I haven't heard from my parents for a long time.Don't worry.----Nothing ---to them.A.has happened B.is happeningC.was happening D.happens
I haven't heard from my parents for a long time.Don't worry.Nothing ---to th
---I haven't heard from my parents for a long time.Don't worry.
----Nothing ---to them.
A.has happened B.is happening
C.was happening D.happens
I haven't heard from my parents for a long time.Don't worry.Nothing ---to th---I haven't heard from my parents for a long time.Don't worry.----Nothing ---to them.A.has happened B.is happeningC.was happening D.happens
同意A.因为不定代词做主语时谓语动词用第三人称单数形式.
A
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