―Do you know where David is I couldn’t find himanywhere―Well He ______ have gone far — his coat’s stillhere

(2017·北京) Jane moved aimlessly down the tree-lined street, not knowing ______she was heading.

The man ________came to see you yesterday has come again.

There are so many books that I can’t decide _______.

does he have to type the report on a computer，he has to get the computer to translate it into sounds