[ Conjunctions and Connectives ]
_____ he was tired, he kept working.
A. Since
B. Although
C. Unless
D. If

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Modals › ViewThis is a secret between you and me, so we …… tell anyone.
A. mustn’t
B. don’t have to
Travel Vocabulary › View
We decided to __________ a cruise in the Mediterranean to visit several islands.
A. go on
B. board
C. explore
