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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He said to us that he ____the teacher’s instructions.
#100425
A
must follow
B
followed
C
follow
D
must have followed
I fixed my eyes upon the newcomer, wondering whether I ________ him somewhere before.
#99984
A
saw   
B
has seen   
C
had seen   
D
would see