During the past 120 years, the world three waves of global economic integration（联合）.
#100672
A
witnessed
B
witnesses
C
has witnessed
D
will witness
推荐题目
____You seem to be glad to come back in your hometown. _____Yes , I ____________.
#103186
A
worked in Shanghai for 10 years.
B
have worked in Shanghai for 10 years.
C
am working in Shanghai for 10 years.
D
had working in Shanghai for 10 years.
—Where is Tom? — Well, he ______ you ______ here．Otherwise he would come down right now．
#103207
A
didn’t know; were
B
hasn’t known; are
C
doesn’t know; are
D
hadn’t known; were
Bats are surprisingly long-lived creatures, some____________ a life span of around 20 years.
#102033
A
have
B
had
C
to have
D
having
The last thirty years _________ the quick development in almost every field in China.
#103107
A
have searched
B
have released
C
have seen
D
have determined
----- Have you ever visited the 2010 Shanghai World Expo? -----Yes．When I was in China , I ______ it twice．
#103152
A
have visited
B
visited
C
had visited
D
would visit