Question

1. One day man will ----------------- live on Mars.

a) can

b) be able to

c) been able to

d) have been able to

2. What have you ------------------ to discover?

a) been able

b) able​

Answer 1

Answer:

1) be able to

2) able.

Is the answer.

Answer 2

Answer:

Be able to

Been able

Hope this helps..

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