country là danh từ số ít đếm được nên ta dùng mạo từ a.
capital là danh từ trong câu mang tính xác định nên ta dùng mạo từ "the"
Đáp án B
He is jealous .............. his rival's success.
Mary married a wealthy man. She got married .............. him last June.
I can't get this ring .............. my finger.
I shall wait .............. you.
These goods are free .............. duty.
I have taught English .............. 6 years.
Elizabeth is fond .............. going to dances.
I have twenty students .............. my class.
He wasted little time .............. social formalities.
It was .............. my will.