1. Was it during the Second World War _____he died?
A.that B. while C. in which D. then
2. Is _____necessary to take off our shoes when we enter the lab?
A.everyone B. this C. her D. it
3.Is _____possible to fly to the moon in a spaceship?
A.now B. that C. it D. man
4.His Parents wouldn't let him marry anyone _____family was poor.
A.of whom B. whom C. of whose D. whose
5._____leaves the room last ought to turn off the light.
A.Anyone B. The person C. Whoever D. Who