I doubt they’ll be able to help but it’s worth

I dont doubt_____to help.A．wantingB．their wantingC．them to wantD．they wanting

I really appreciate （)to help me,but I am sure that I will be able to manage by mysel

I doubt they’ll be able to help but it’s worth

I’m sure I’ll be able to amuse myself for

I’m sure I’ll be able to amuse myself for

I’m sure I’ll be able to amuse myself for