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Help with 2 Spanish Questions!!!! Will mark brainliest!

1.) Based on what we learned, fill in the formula below.

___________ cuando ___________

A. preterite, preterite
B. preterite, imperfect
C. imperfect, imperfect
D. imperfect, preterite

2.) Based on what we learned, fill in the formula below.

___________ mientras ___________

A. imperfect, preterite
B. imperfect, imperfect
C. preterite, preterite
D. preterite, imperfect