Question

we are tired. we___ ten kilometers
A) Have walked
B) Has walked
C) Have walk
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Answer 1

Answer:

We are tired . We have walked ten kilometres.

Answer 2

Answer:

A) Have walked

Explanation:

This is the past tense of walk and so that marks off C).

B) is incorrect because has is past tense so you cannot put two past tense words together.