its the jet leg

D 考查定语从句及强调句。第一空考查定语从句，先行词为the pigeon，在从句中作定语，第二空that为强调句结构，故选D。

扩展阅读：its finger lickin good ... lets make a puppet ... it is my pleasure ... the classroomsong ... this war of mine ... lets go and see ... you are beautiful ... you are welcome ... its my life ...