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. i don’t think ___ possible to master a foreign language without much memory work. a.this b.that c.its d.it 5.she heard of a terrible noise, ___ brought her heart into her mouth. a.it b.which c.this d.that 6.alice received an invitation from her boss, ____ came as a surprise. a.it b.that c.which
