@inhinyero_sg in my experience..
Speaking - mas mahirap dahil may mga images na lumabas na wala sa mock exams/reviewers.
Reading - same difficulty.
Listening - same difficulty. mejo iba lang kasi nasanay ako sa lectures nung mock tests/reviewer. tapos sa actual exam more on dialogues.
Writing - same difficulty. I suggest na magbasa ng current events kasi ang naalala ko yung isang essay question ko is more on the current issues ng mundo.