_____ we discover life on another planet, Do you think ...

[ Prepositions ]

_____ we discover life on another planet, Do you think it will be intelligent?

A. As soon as

B. When

C. Until

D. If

Select your answer:

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Could you please tell me _____?

A. if is this shirt on sale

B. is this shirt on sale

C. if this shirt is on sale

D. why is this shirt on sale

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I enjoy ………………. to classical music.

A. listening

B. to listen

C. listens

D. listen