Some molecules are large enough ________ (see) under the electronic microscope.
to be seen
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Thosewho’dliketovisittheexhibition________(sign)yournameshere.
Thedirectorrecommendedthatshe________(study)moreEnglishbeforegoingabroad.
heteachertoldthemsincelight________(travel)fasterthansound,lightning________(appear)togobeforethunder.
Ipreferthisdiagram________thatone.
________(catch)intherain,hewaswettotheskin.