—Sorry, I didn't catch you.—Be quiet, please; the baby          ________.
#105309
A
was sleeping
B
is sleeping
C
slept
D
has slept
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With more forests being destroyed, huge quantities of good earth ______ each year.
#105331
A
is washing away
B
is being washed away
C
are washing away
D
are being washed away
New medicines and instruments ______ every day to extend life.
#105334
A
develop
B
are being developed
C
are developing
D
have developed
Though the medicine for my disease______, I should often______ at home or in the open air.
#105327
A
works out; work out
B
is working; work out
C
is working out; work
D
works; work