[ Grammar ]
Brush your teeth ________ you go to bed.
A. before
B. when
C. since
D. unless
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Grammar › View_____ is the longest ruler among the three?
A. How
B. Who
C. Whom
D. Which
Transitional Phrases and Conjunctions › View
You can learn various instruments, …………… the guitar and the piano, if you practice daily.
A. On the other hand
B. However
C. While
D. Such as