Question

y the time Cynthia books the flight to Iceland, she _______ her sister about the visit. 1 )has called 2)will has called 3)calls 4)will have called

Answer 1

3) calls

By the time Cynthia books the flight to Iceland, she calls her sister about the visit.

Answer 2

Hiii........ friend

Here is your answer
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Ans-: "Has called"

Bcz It is present perfect time.

Present perfect rule is-: Sub+ has/have+ v3+ others.

So, follow up this rule. the sentence is

By the time Cynthia books the flight to Iceland, she "has called" her sister about the visit.

Hope it will help uh!!!☺️

Be brainly....

@Soma❤️