A.risk
B.threat
C.danger
D.jeopardy

A.so
B.or
C.whereas
D.because

A.effective
B.effectively
C.affect
D.effect

A.that
B.which
C.when
D.where

A.at
B.to
C.in
D.on

A.in a larger number
B.very quickly
C.on the second floor
D.every two hours

A.in a larger number
B.very quickly
C.on the second floor
D.every two hours

A.using verbs
B.using facial expressions
C.using speech
D.using gesture

A.Despite accepting that changes are unavoidable, but we will not allow everything to be wiped out, destroyed or forgotten.
B.We accept that changes are unavoidable, as we will not allow everything to be wiped out, destroyed or forgotten.
C.Rather than accepting that changes are unavoidable we will allow everything to be wiped out, destroyed or forgotten.
D.Accepting that changes are unavoidable does not mean that we will allow everything to be wiped out, destroyed or forgotten.

A.Historical differences among three large United States cities.
B.The development of trade routes through United States cities.
C.Contrasts in settlement patterns in United States.
D.The importance of geographical situation in the growth of United States cities.