1. After some hesitation (1) he decided to change (2) his plan in (3) accordance to my suggestion (4) No error (5).

2. I will discuss (1) the matter with him (2) when I will see him (3) in the next few days (4) No error (5).

3. On hearing from you (1) I will come not only (2) to the airport but will (3) also help you with customs clearance (4) No error (5).

4. Generally when in a difficult situation (1) I prefer taking advice from my frineds (2) than trying to deal with it (3) on my own (4) No error (5).

5. Twice four (1) is eight (2) while two and four (3) is six (4) No error (5).