The first African-American president of the United States received a(n)_________ welcome in the African countries, where he was received as a returning son．

romantic

bureaucratic

enthusiastic

optimistic

Several years after they got married he _________ chatting on the Internet until very late, which eventually resulted in their divorce．

took on

came to

took to

came about

He who _________ to succeed without hard work _________ to be disappointed．

hope; are bound

hopes; is bound

hope; are due

hopes; is due

Fireworks exploded during _________ opening ceremony of _________ 2011 Asian Cup football tournament at Khalifa Stadium．

the; a

the：the

a; a

a; the

Jackson took part in the English contest and, _________ is more surprising, won the first place．

that

what

which

it

_________ around the Water Cube，we were then taken to see the Bird's Nest in Beijing．

To show

To be shown

Having shown

Having been shown

The BRICS countries have _________ to be a source of global economic development．

worked out

put out

turned out

taken out

Almost everyone has his own strengths and weaknesses．It is _________ others are weak that maybe you have a great advantage．

although

unless

because

where

I had just given up the hope of going to the concert _________ sorneone offered to spare me a ticket．

when

while

so

until

Don't blame them any more－this is _________ because they are still young and lack experience．

exactly

generally

simply

eventually