_______ it seems difficult at first, it's actually quite easy. ...

★ Adverbial Clauses

_______ it seems difficult at first, it’s actually quite easy.

A. Since

B. While

C. Although

D. If

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______, he will have worked there for 10 years.

A. While his contract with the company is expiring

B. By the time his contract with the company expires

C. As soon as his contract with the company had expired

D. Before his contract with the company will expire