1.By then our experiment had reached _____A____ stage
a profound B
an ultimate C
a perpetual D
a very important 2.The boy’s bad behavior at school ___D_____ his parents as well as his teachers
sat on B
handled C
worry D
bothered 3.She promised to give me whatever help I __B____
will need B
would need C
had needed D
was needing 4.He jumped onto the train just as it was pulling ___C___
from C
away D
off 5.It’s no use thinking too much about one’s ___C____ youth
lose B
to lose C
lost D
losing 6.The old couple decided to move out of town to a quiet ___B___ , where they had spent several years immediately after their marriage
space B
suburb C
neighborhood D
area 7.If I had __C__ in business, I might be a very wealthy man today
done B
gone C
stayed D
stopped 8.Henry i