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【单选题】
Which statement describes VRRP object tracking?（）A.
It monitors traffic flow and link utilization.
B.
It ensures the best VRRP router is the virtual router master for the group.
C.
It causes traffic to dynamically move to higher bandwidth links
D.
It thwarts man-in-the-middle attacks.
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【单选题】— ______ that he picked up his uncle at the airport? — It was at 6:00 in the afternoon ______ he got off work. [ ]
A.
Was it when; that
B.
When was it; that
C.
Was it when ; when
D.
When was it; when
【单选题】When he saw a wallet on the playground , he at once .
A.
picked it up
B.
gave it up.
C.
picked up it.
【单选题】--- _______ that he picked up French? --- It was in 2010 _______ he traveled in France.
A.
Was it when; that
B.
When was it; that
C.
Was it when; when
D.
When was it; when
【单选题】After_____a11 the apples，he____ the biggest one in the basket and handed it to me．
A.
picked；picked up
B.
picking；picked out
C.
picking Out；picked
D.
picking up；picked
【单选题】He ______ the phone expecting to hear the chairman's gruff voice. A. picked up B. picked at C. picked on D. picked out
A.
picked up
B.
picked at
C.
picked on
D.
picked out
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