___________it rained heavily, I went to school on time.
A. However
B. But
C. Although
D. Because
KEY C
Giải thích: Although + mệnh đề: mặc dù
Dịch: Dù trời mưa to, tôi vẫn đến trường đúng giờ.
Hardly any of the paintings at the gallery were for sale, _____?
English has become a second language in countries like India, Nigeria or Singapore where_______ for administration, broadcasting and education.