[영어 문법 문제] 고수님들 도와주세요..ㅠㅠ

[Error Correction]

1. To play tennis is a common way for many people to keep themselves fit and healthy.
------------- -- ------------ ------------------
[a] [b] [c] [d]

2. The man shouldn't have drunk so much last night because it is obviously effecting his work this morning.
.............................. ........... ............ ........................
[a] [b] [c] [d]

3. The new employee appears to be happy with her job because she always smiles at the other employees friendly.
............ ...... ......................... ..........
[a] [b] [c] [d]

틀린 부분 찾는문제인데요.. 어디가 틀렸는지 모르겠어요..
도와주세요.. 고수님들..^^