英语高手快来!帮我解答问题!请详细作解释!

英语高手快来!帮我解答问题!请详细作解释!
请做详细的解释!谢谢!
1This book will be____in your studies.
Aof great use Bof helpful Cwith care Dgreat importances
2the chance is____great importance to each one of you.
Afor Bat Cin Dof
3I want to go aboard____further study.
Afor Bwith Con Dto
4The concert was wonderful.She lost her heart____the wonderful music.
Ain Bto Cat Dwith
5I believe that I have left a good felling____those jabs.
Aon Bfor Cat Din
答案：a d a b a请给我解释！