[ Modals ]
Tim looks so frightened and upset. He _____ something terrible.
A. must experience
B. ought to have experienced
C. should have experienced
D. must have experienced

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Subject-Verb Agreement › ViewComputers ______ a lot of fun and should not be feared.
A. Was
B. Are
C. Were
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Grammar › View
. Choose the word with the prefix meaning “under”:
A. overhead
B. submarine
C. predict
D. return