this is______"r"and that's_____"u"

this is______"r"and that's_____"u" This is___ “r”and that's_____"u". There is______  “u” and ______“r” in the word “umbrella This building is______ beautiful______ (不如)that one. ( ) 1.This box is______ that one. ( )This girl is good ,but that girl is______. 模仿例句改句子.急例句:1.This dress is long,but that one is______.This Two and three is______. This is _______"M" and that's __________ "U".A.a,a B.an,an C scientists think that this cold and lonely place can teach u This is空'X'and that is空U填什么? This is（ ）“f”and that is （）“u"括号里应该填什么