[ Adverb Clauses ]
Which subordinating conjunction is used to introduce an adverb clause of contrast?
A. since
B. while
C. because
D. unless
Select your answer:

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— __________, you __________. You can do it tomorrow.
A. No;needn’t
B. No;mustn’t
C. Yes;must
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________ is the most expensive city in the world? – I think it’s Tokyo.
A. What
B. When
C. How
D. Where
