This test ________ a number of multiple choice questions.
A、composesofC
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Herefusedtotelluswhetherhe________(undertake)thejob.
Ipreferthisdiagram________thatone.
heteachertoldthemsincelight________(travel)fasterthansound,lightning________(appear)togobeforethunder.
Hefellasleepimmediatelylastnight;hemust________(be)verytired.
Somemoleculesarelargeenough________(see)undertheelectronicmicroscope.
