He is only too ready to help others，seldom，________refusing them when they turn to him.
#79541
A
if never
B
if ever
C
if not
D
if no
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While________ along the road, Mr. Smith met an old friend of his.
#80925
A
walked
B
he is walking
C
walking
D
is walking
What would have happened ______,as far as the river bank ?
#84429
A
Bob had walked farther
B
If Bob should walk farther
C
Had Bob walked farther
D
If Bob walked farther
I watched the man for a long time and wanted to know .
#82080
A
whether I have seen him before
B
where I had seen him before
C
that I had seen him before
D
when did I see him
________ tomorrow, I would take a bus to school.
#81537
A
If it rains
B
If it was to rain
C
Should it rain
D
Rained it
The boy would have died, _______ on him without delay.
#83395
A
if the doctor didn’t operate
B
if the doctor wouldn’t operate
C
would the doctor not operate
D
had the doctor not operated