下列词语中加线的字，每组的读音都不相同的一项是( )

ngus in the program today __________Mr. Smith, together with his wife. Welcome toour program.

There’s too much work to do this month.— Don’t worry. Let’s aplan first. Then we can complete all work well.

―Do you know where David is? I couldn’t find him anywhere.―Well. He ______ have gone far — his coat’s still here.

The police can’t decide whether the suspect is guilty because he could prove he was________ at the time of the crime.