請問呢句英文有無錯?!

"a little" (determiner 數量詞) is wrong as it is used with uncountable nouns to mean "some".

You should use another determiner "a few" instead, as it is used with plural nouns ("dolls" in this case) ans a plural verb to mean "some".

Correction:
Sandy got many presents. She got a few dolls. They are very cute but she would rather have robots!

有，Sandy got many presents. She got （a little dolls）. They are very cute but she would rather have robots!
（a little dolls）：a用在單數，s是複數

2015-01-09 21:28:20 補充：
應刪減a

Sandy got many presents. She got SOME little dolls. They are very cute but she would rather have robots.

多過一個唔要 A

Sandy got many presents. She got 1.(a little dolls). 2.(They are) very cute but she would rather have robots
如果得一個little doll的話1and2()都有錯1.(s)2.(xthey are it is)