there is (）”s”in the word

there is (）”s”in the word There is ( ) "s" in the word There is ( )“s” in the word “six”. Is there （ ） “u” in the word “big” No,there’s（ ）“i”in it. There is a 's' in the word 'small'.改错 1.There is ___"s"in the word of"science". There is ( ) "s" in the word "bus".括号里填啥,为什么 There is ________"s'' in the word "sun''(a,an) There is _____ “s” in the word “six” 怎么答 为什么There is () "s" in the word "school" There is ( )"u"and ( )"s" in the word "us There is ()"u"and()"s"in the word "useful".