These pictures are too small. Th

These pictures are too small. The photographer has to（ ）them. 

enclose

entrance

enlarge 

enjoy

本题考查常见动词的词义辨析。

enclose：围绕；entrance：使...入迷；enlarge：放大；enjoy：享受，由“too small太小”可知，C选项enlarge符合题意。

句意：这些照片太小了。摄影师不得不放大它们。