[ Subject and Verb Agreement ]
The samples on the tray in the lab ______ testing.
A. need
B. needs

Random Topics:
Conjunctions and TransitionsPhrases and ClausesGrammar / PronounsRelative Clauses beginning with PrepositionsPast Simple vs Present SimpleIrregular Plural NounsPast PerfectCoordinating ConjunctionsUncountable Nouns-ed or -ingOther quiz:
Grammar › ViewAfter marriage, Mrs. Hoa always keeps good ____ with her mother-in-law.
A. association
B. relation
C. friendship
D. relationship
Prepositions of Time › View
We go on holiday ___________ August.
A. in
B. on
C. at
