I understand, that you're asking regarding a suitable amplifier circuit with npn transistors (2N2222) only? I guess you have learned about transistor amplifiers before, so the normal way would be to review the stuff and find out, which circuit could be suitable. From voltage gain, it must be a two or three transistor circuit. There could be different techniques to adjust in- and output impedances. The specification is incomplete to my opinion. Cause impedances and gain are interdependent, source and load impedances of test circuit must be specified (could be e. g. zero and infinity, but not necessarily). Also other parameters as supply voltage, maximum output voltage, frequency range are unknown. But I guess, the problem is just a modification of a known problem and you implicitely know about these parameters.