Alex did not do very well in the class because _________ .
A.he studied not good
B.he failed to study properly
C.he was a badly student
D.he was not good to study

Conservation efforts have slowed _________ .
A.But not stopping the loss of biodiversity
B.But not stopped the loss of biodiversity
C.But doesn't stop the loss of biodiversity
D.Although it doesn't stop the loss of biodiversity

It was in the United Kingdom and then France _________ .
A.Where the writer works for the rest of his life
B.When the writer worked for the rest of his life
C.That the writer worked for the rest of his life
D.Did the writer work for the rest of his life

Along the river bank _________ .
A.do grow a lot of wild flowers and grass
B.a lot of wild flowers and grass grow
C.a lot of wild flowers and grass do grow
D.grow a lot of wild flowers and grass

It would be both noticed and appreciating if you could finish the work before you leave.
A.both
B.appreciating
C.the work
D.leave

The suits were hanged in the close when they were returned from the cleaners.
A.The
B.hanged
C.when
D.were returned

Commercial letters of credit are often used to financing export trade, but they have other uses.
A.are
B.financing
C.export
D.other uses

_________(51)
A.causes
B.results
C.leads
D.invents

_________(53)
A.manner
B.approach
C.custom
D.style

_________(54)
A.crosses
B.refuses
C.breaks
D.cracks