$\text{@Ochi}$
She was very nervous before every geography exam.
A. She used to being very nervous before every geography exam.
B. She use to being very nervous before every geography exam.
C. She used to be very nervous before every geography exam.
D. She use to be very nervous before every geography exam.
Bonus: Cấu trúc used to
S + used to Vbare + ... : Đã tưng làm gì
Và used to Vbare (đã từng) >< be/get used to V-ing (quen với)
$\text{#BTS}$