A. weren’t we
B.mustn’t we
C.hadn’t we
D.didn’t we
How long() you() a member of the club?A.have,,joinedB.have,,beenC.has,,joinedD.has,,been
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Where ________ you ________?A.are/beB.have/beC.is/beD.have/been
9． _______you _______ stay at home today?A． Do ; have toB． Must; have toC． Have; toD． Do ; must
Why()the old block of flats()demolished next month?A、are…beingB、is…beingC、has…beenD、have…been
What a waste! Why do you () the water () all the time ?A、have…flowingB、have…flowC、have…to flowD、have…flowed
We're looking forward to()service to you.A、 being ofB、be ofC、offerD、have
已知last指向单向简单链表的尾结点，将s所指结点加在表尾，不正确的操作是____。A．last-＞next=s,last=s,last-＞next=NULL;B．last-＞next=s,s-＞next=NULL,last=s;C．s-＞next=NULL, last-＞next=s, s=last;D．s-＞next=NULL, last-＞next=s,last=s;
