Hoàn thành các câu sau

1,     .... her income is quite high, she isn't satisfied with it.
2,The singing competition will be held at the end of the month.
A. contest
B. examination
C. determination
D. arrangement
3,Gender equality can increase the long-term competitiveness of the (economic) .....
4,I can't get used to (wear)  ...... high-heeled shoes.