[ Helping and Linking Verbs ]
What is the helping verb in the following sentence: They were laughing at his funny jokes.
A. They
B. jokes
C. laughing
D. were

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A. preceded
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What _____ to Jack yesterday evening? He didn’t come to my birthday party.
A. happened
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_______ the food _______ great at the camp?
A. Is been
B. are been
C. has been
D. have been
