How can an SR Flip Flop be made using a D Flip Flop and other Gates?
A D flip flop simply latches the value of a wire on it's D pin at the rising edge of a clock. Using three inputs (S, R, and Q (output of the DFF)), you need to create a small combinational circuit which mimics an SR flop: 


If S is set, the value of D should be 1
If R is set, the value of D should be 0
If neither is set, the value of D should be Q


With these three statements it's simple to create a small truth table and from that to create the combinational circuit which should drive your D pin.