答案：和平与发展。
A. While crossing
B. While crossed
C. Being crossing
D. Being crossed
A. talk
B. speech
C. lesson
D. lie
解析：解析:talk:give/have a talk 谈话解析:speech:make/deliver a speech 做演讲解析:lesson:teach a lesson: 教训解析:learn one＇s lesson: 汲取教训解析:lie:tell a lie
A. with
B. as
C. while
D. when
A. not to take
B. to have not taken
C. not having taken
D. he would not take
解析：解析:(Eric regretted not taking the earlier flight.)
A. which
B. what
C. that
D. of
