In summer, food goes bad easily     the weather is very hot.
#56224
A
though
B
because
C
but
D
or
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He had to retire(退休) early ______ poor health.
#58273
A
as a result
B
because
C
so
D
because of
       he is very poor,       he feels very happy.
#55438
A
Although; but
B
Although; /
C
Because; so
D
Because; /