[ Grammar ]
We …………………………. in the classroom.
A. must run
B. must talk
C. mustn’t run

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Grammar › ViewAdmittedly, choosing the right modern design is not easy. ________ , the rewards for getting it right are much greater.
A. However
B. Although
C. Finally
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I love traveling _____ trains.
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Vocabulary › Viewtemporarily unable to speak because of fear
A. speechless
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He ___ his leg, so he couldn’t go skiing.
A. had been breaking
B. had broken
C. break