There must be something wrong with my computer,（)there？A. mustn'tB. needn'tC.

public class Something {

public static void main(String[] args) {

Something s = new Something();

System.out.println("s.doSomething() returns " + doSomething());

}

public String doSomething() {

return "Do something ...";

}

}

看上去很完美。

public class Something {

public static void main(String[] args) {

Something s = new Something();

System.out.println("s.doSomething() returns " + doSomething());

}

public String doSomething() {

return "Do something ...";

}

}

看上去很完美。

下面的代码中方法unsafe()有异常发生，那么可以加在第一行的语句为()。 { if(unsafe()) { //do something } else if(safe()) { //do the other} } Ⅰ：public void methodName() Ⅱ：public void methodName() throw IOException Ⅲ：public void methodName() throws IOException Ⅳ：public void methodName() throws Exception

A．Ⅲ、Ⅳ

B．Ⅱ、Ⅲ、Ⅳ

C．Ⅰ、Ⅲ

D．Ⅰ、Ⅳ

--- Was that the headmaster who walked by？ --- _______.

A、It must be that

B、It must be him

C、It must be it

D、It must have been

A.it must have rained

B.it must rain

C.it must be raining

D.it must have been rainin

A.must have watered

B.must be watered

C.must water

D.must be watering

A.must have

B.must have had

C.must have been

On no account ______ to anyone.

A、my name must be mentioned

B、must my name mention

C、must my name be mentioned

D、my name must mention

It ______ last night, for the ground is wet.

A、must rain

B、must be going to rain

C、must have rained

D、ought to rain

The road was wet this morning.It()last night

A)must be raining

B)By must rain

C)must have rained

D)have been rained