【单选题】【消耗次数：1】
I _____ a few high school classmates at KFC yesterday.
①
came across
②
came along
③
came to
④
came on
参考答案：
复制
纠错
相关题目
【单选题】
Its on No.21 bus ( ) I came across my ffirst English teacher yesterday.
①
where
②
that
③
which
④
how
【单选题】
The manager came over and asked the customer how ___.
①
did the quarrel came about
②
the quarrel had come about
③
had the quarrel come about
④
had the quarrel come about
【判断题】
Mr. Li came across an old friend yesterday. They were both surprised.划线部分应该翻译成“登门拜访”
①
正确
②
错误
【单选题】
When Lily came home at 5 p.m. yesterday, her mother ______ dinner in the kitchen.
①
cooked
②
was cooking
③
cooks
④
has cooked
【单选题】
I came to?Beijing?in 1991 and have been ?[填空] here ever since.
①
live
②
lives
③
lived
④
living
随机题目
【单选题】
设 G*是具有 k(k 3 2)个连通分支的平面图 G 的对偶图, n*, m*, r* 和 n, m, r 分别为 G*和 G 的顶点数, 边数, 面数, 则下面哪个式子不正确：
①
n* = r;
②
m* = m;
③
r* = n - k + 1;
④
r* = n 。
【单选题】
关于n阶m边的无向简单图的支配数g0、点独立数b0、点覆盖数a0、匹配数b1与边覆盖数a1，下面的哪个性质不正确：
①
g0 ≤ b0；
②
b1 ≥ a1；
③
a1 + b1 = n；
④
b1 ≤ a1。
【单选题】
关于n阶m边的无向简单图的支配数g0、点独立数b0与点覆盖数a0，下面的哪个性质不正确：
①
g0 ≤ b0；
②
a0 + b0 = n；
③
a0 + b0 = m；
④
都大于等于1。