He feels that his health ____ owing to ____ a long walk every other day. 
#104858
A
is improving; taking
B
has been improved; being taken
C
improved; taken
D
is improving; have taken
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Students taking the course _____to finish their homework with the help of computers.
#103877
A
are encouraged
B
have encouraged
C
are encouraging
D
had been encouraged
. ---- How long ____ at this job? ---- Since 1990.
#102924
A
were you employed
B
have you been employed
C
had you been employed
D
will you be employed