2.3 Fill in each blank with one suitable preposition (0,5pt). 1. In the end, he succeeded .............................. solving the problem. 2. She apologized .............................. her teacher for her coming late. 3. Mr. Jones is in charge ............................ the planning department. 4. We can’t deal ............................... this problem without his help. 5. We were all surprised ........................... the news about our success.