The samples on the tray in the lab ..... testing. ...

[ Subject Verb Agreement ]

The samples on the tray in the lab ….. testing.

A. need

B. needs

Select your answer:

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Grammar Rules › View

Choose

This modal verb is used when something is possibly true.

A. might/may/could

B. can’t

C. must

Grammar › View

    What type of word is underlined?

    Jon hates cleaning his room.

A.     gerund

B.     participle

C.     infinitive