American people divide their days 21 several blocks 22 time,and plan different activities 23 different times.American ti

American people divide their days 21 several blocks 22 time,and plan different activities 23 different times.American time is "on the dot".If something is supposed to happen 24 eight o'clock,it will begin at eight.American value promptness and may become angry if a person is more than 15 minutes late 25 a good reason.If you know you are going to be late,call 26 advance and let someone know.27 you arrive late,you should apologized and explain why.Americans arrive 28 time for doctors" appointments.The doctor may keep you 29 ,but if you keep the doctor waiting,you may get a bill 30 the doctor's time!
21
by
in
into
on
22
at
of
in
for
23
for
up
into
to
24
at
on
by
in
25
with not
without
not at
not with
26
on
at
for
in
27
At
In
If
By
28
on
in
at
by
29
to wait
waiting
waited
wait
30
for
with
over
in
完形填空,急……