_____has always fascinated biologists.

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问题 _____has always fascinated biologists.

选项 A、Fish are swimming
B、The fish can swim
C、How fish swim
D、Could fish swim

答案C

解析 The sentence needs noun structure as its subject. How fish swim is a noun clause.

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托福（TOEFL）

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_____has always fascinated biologists.

托福（TOEFL）

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Whatdideachpersonsaywastheprincipalcauseofstressforthem?ChooseFOURanswersfromtheboxandwritethecorrectlett

WriteNOMORETHANTWOWORDSAND/ORANUMBERforeachanswer.MonarchButterfliesHibernationButterflyspeciesadoptdifferent

Choosethecorrectletter,A,B,orC.WhywasJeninvitedtotheprofessor’spersonalproject?

Babies(have)softspots(between)thebones(of)theirskulls,which(allowing)forfurthergrowth.

"ArtHistoryClass"Accordingtotheprofessor,whattwolimitationswerenotedinDaguerre’sprocessfordevelopingandfixin

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A．50％～55％B．6%～8％C．19％～24％D．13%～19％E．0％～4％从各种动、植物组织提取的蛋白质，经元素分析表明：含碳量为()

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