Linda knows a lot about the aquarium because she __(be)there many times,but I__(not be)there yet,I want to go there next week.

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Linda knows a lot about the aquarium because she __(be)there many times,but I__(not be)there yet,I want to go there next week.

Linda knows a lot about the aquarium because she __(be)there many times,but I__(not be)there yet,I want to go there next week.
Linda knows a lot about the aquarium because she __(be)there many times,but I__(not be)there yet,I want to go there next week.

Linda knows a lot about the aquarium because she __(be)there many times,but I__(not be)there yet,I want to go there next week.
has been
haven't been

has been.
have not been