1,kate is good at history .what about ( A,he B,him C,we D,she

1,kate is good at history .what about ( A,he B,him C,we D,she
2,how many places （ ）you visit last year?A,do B,are C,can D,did
3,there are many （ ）in the world.A,big city B,big cities C,biggest city D,biggest cities
4,in the park,the birds （ ）happily.A,singing B,sing C,sings D,to sing