You won't be able to speak English unless you..........(study) hard ...

★ Tenses (Present, Past, Future Forms)

You won’t be able to speak English unless you……….(study) hard

A. will study

B. study

C. studied

D. would study

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I don’t know how to use this device. No problem, I…………….(show) you.

A. will show

B. am going to show

C. am showing