Find one error in each of the following sentences (A, B, C or D)

It is much easier for a foreigner to become an American citizen if he has a close relative whoever is already an American. 

Choose the best answer to complete each sentence

Do you know the girl ______Tom is talking to?

Choose the best answer to complete each sentence

The party_____we went to wasn't very enjoyable.

Choose the best answer to complete each sentence

I need to find a painting ____ will match the rest of my room.

Choose the best answer to complete each sentence

There are too many poor people ____ do not have enough to eat in the world.

Choose the best answer to complete each sentence

The trees ____ have the beautiful flowers grow near the gate of the garden.

Choose the best answer to complete each sentence

She fell in love with a man ____ was from another country.

Choose the best answer to complete each sentence

She ate an apple ____ was still green.