_____, he has a lot of knowledge about computer.

arling! If you want a necklace, I’ll buy one for you at once.—No, a necklace is not _______ that I need most.

After driving for about an hour, he found himself lost in the middle of nowhere, so he stopped his car to ________ his map.

What were you and the teacher talking about—He wondered ________．

Did you buy the dictionary—- No. My lost dictionary was found, so I ________ a new one.