Choose the correct answer

giải giúp mik vs ạ mik cần gấp
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11.
his illness, he had to cancel the appointment.
B. Despite
C. If
he went to school.
C. Although
he always walks to school.
A. However
12. Minh had a terrible headache.
A. However
13. Tom has a bike,
A. but
14. My sister will take the plane
B. But
B. because of
A. because
B. so that
15. We decided to leave the party early_
B. because
A. due to
C. because
she dislikes flying.
C. although
C. but
it was boring.
D. Because of
D. Because
D. despite
D. before
D. and