[ Subject Verb Agreement ]
The samples on the tray in the lab (need/needs) testing.
A. need
B. needs
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Used to › ViewTeachers ________ to be stricter 40 years ago
A. didn´t used
B. use to
C. used to
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Alice is so sad. They… up with Bill.
A. must broke
B. must have broken
C. might breaks
D. need have broken