The flight had to be delayed_____the bad weather.
A. because
B. Because of
C. despite
D. when
KEY B
Giải thích: because of + N: bởi vì
Dịch: Chuyến bay phải bị hoãn lại vì thời tiết xấu.
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.