选出下列句子中语法错误的选项：I have three friends.Mike, Billy and Sandy.（)

A.He cares

B.thus

C.he hopes they can live

D.没有错误

请从下列选项中选出“在美国，人人都能买到枪”地道的英文表达。()

A、In the United States, everyone can buy a gun.

B、In the United States, guns are available to everyone.

C、In the United States, every person can buy a gun.

下列选项中，属于常模参照测验的是（）

A．教师自编测验

B．艾森克人格测验

C．句子完成测验

D．医师资格测验

A.will wash

B.shall wash

C.have washed

You______ the difficulties after I explain the whole thing to you.

A．will be seen

B．will have seen

C．will see

D．see

My wallet is nowhere to be found. I______ when I was on the bus.

A．must drop it

B．should have dropped it

C．must have dropped it

D．had dropped it

My watch is nowhere to be found. I ______ when I was on the bus.

A．must drop it

B．should have dropped it

C．must have dropped it

D．ought to have dropped it

A.逻辑错误

B.语法错误

C.不进入循环

D.死循环

(3)设文法G[S]的LR(1)有效项目为： I＝[S→.A，] 求closure({I})。 (4)设LR(1)项目集中有一状态Si： Si＝{[A→A＋A.，＋／]，[A→A.＋A，＋／]} 求go(Si，＋)。

A.range(1, 5)

B."ABC"

C.54

D.[5, 4]

A、今天星期一

B、He is sick

C、I have just finished my word

D、请把这件事尽快办一下