[ Vocabulary ]
a necessary predecessor
A. Incompatible
B. Catalyst
C. Precursor
D. Synthesis
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Grammar › ViewShe worked ___ a rich family and her job was to care ___ the sick grandmother.
A. on
B. in
C. for
D. about
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Grammar › View
Your watch is _________ than mine.
A. the most cheap
B. cheaper
C. more cheap
D. the more cheaper