He _____ to surf the Internet last night. A: is seenB: sawC: was seenD: was seeing
He _____ to surf the Internet last night.
A: is seen
B: saw
C: was seen
D: was seeing
相关考题：
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;
7、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，正确的操作是____。A．s-＞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=last, last-＞next=NULL,last=s;
数组q[M]存储一个循环队，first和last分别是首尾指针，如果使元素x进队操作的语句为“q[last]=x,last=（last+1)%m;”那么判断队满的条件是_____。A．last= =firstB．last= =M-1C．(last+1)%m= =firstD．last+1= =first
数组q[M]存储一个循环队，first和last分别是首尾指针。如果使元素x出队操作的语句为“first=（first+1)%m, x=q[first];”。那么元素x进队的语句是_____。A．last=(last+1)%m,q[last]=x;B．x=q[last], last =(last+1)%m;C．q[last+1]=x;D．q[(last+1)%m]=x;
已知last指向单向简单链表的尾结点，将s所指结点插入在表尾，正确的操作是____。A．s-＞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=last, last-＞next=NULL,last=s;
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，正确的操作是____。A．s-＞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=last, last-＞next=NULL,last=s;
2、已知last指向单向简单链表的尾结点，将s所指结点插入在表尾，正确的操作是____。A．s-＞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=last, last-＞next=NULL,last=s;
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．s-＞next=NULL, last-＞next=s,last=s;B．s-＞next=NULL, last-＞next=s, s=last;C．last-＞next=s,s-＞next=NULL,last=s;D．last-＞next=s,last=s,last-＞next=NULL;
11、数组q[M]存储一个循环队，first和last分别是首尾指针。如果使元素x出队操作的语句为“first=（first+1)%m, x=q[first];”。那么元素x进队的语句是_____。A．last=(last+1)%m,q[last]=x;B．x=q[last], last =(last+1)%m;C．q[last+1]=x;D．q[(last+1)%m]=x;