While ____ the dog, you should take care not to get loose . Otherwise, it may be dangerous to strangers.
#82650
A
walking;
B
walked
C
walking for
D
training for
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I received his mother’s telephone call at eleven.＿＿that he was badly hurt in an accident yesterday.
#83933
A
Then did I know
B
Only then I knew
C
Only then did I know
D
Only then knew I
Not until Mary reads her composition the second time ___________the spelling mistake.
#81962
A
did she notice
B
she noticed
C
does she notice
D
she has noticed
Only when I saw Night Banquet a second time_______to appreciate its subject and music beauty.
#84564
A
did I begin
B
that I began
C
I began
D
had I began
----I hear that Tom was badly injured in a car accident and is in hospital now.-----_________, let’s pay a visit to him.
#81722
A
If any
B
If so
C
When possible
D
When necessary