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Not until the end of the 19th century ______ people ______ that the atom was not the smallest particle.
A.do … find
B.did … find
C.were … found
D.have … found
A.do … find
B.did … find
C.were … found
D.have … found
A.to run
B.run
C.runing
D.running
A.Until ... did the chairman find
B.Not until ... did the chairman find
C.Until ... the chairman found
D.Not until ... the chairman found
A.mode
B.inferior
C.pitch
D.response
A.Until ... did the chairman find
B.Until ... the chairman found
C.Not until ... did the chairman find
D.Not until ... the chairman found
Juliet is not at work. She is taking a ______until the end of this week.
A.vocation
B.vacation
C.vacancy
D.volume
I asked him not (say) ______ anything about our contract until the end of the month.
I asked her not______(tell)others anything about our research until the end of the week.
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