Those people_____a general understanding of the present situation.
a.lack of
b.are lacking of
c.lack
d.are in lack
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He didn’t seem to mind_____the music while he was studying.
a.them listening
b.them to listen to
c.when she returned
d.that did she return
I can speak_____German.
a.either Russian nor
b.neither Russian or
c.no Russian nor
d.neither Russian nor
It was not until she had finished all her work_____.
a.did she return
b.that she returned
c.when she returned
d.that did she return
Copernicus maintained that the earth_____round the sun.
a.moves
b.moved
c.moving
d.move