[ Idioms ]
Only good employer-employee relationships can make ___ good production.
a. at
b. for
c. after

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Grammar - must & have toAdjective, Adverb, and Noun FormsArticle and Order of AdjctivePreposition & GerundPresent/Past/Future Continuous TenseFuture Time and TensesAdverbs of Time and PlaceAspect or tenses of VerbsModals and ResponsibilitiesPrepositions and TensesOther quiz:
Preposition › ViewHe is familiar ___ the software.
A. of
B. on
C. at
D. with
Grammar › View
The children—— black shoes.
A. Have
B. Has