根据句意，用括号中所给词的适当形式填空，并将其单词写在答题卷相应的位置。（共5小题，每小题1分，满分5分）

小题1:What a     (sun) day it is today! Let’s go to the park.

小题2:We need some sugar，two____________（tomato）and some honey to make the salad.

小题3:Mark got a new bike from his uncle on his ___________（five）birthday.

小题4:I think this is         (Tom) room.

小题5:You can’t watch TV until you finish ________(do) your homework.

合成洗涤剂的主要原料来自（）

A.石油

B.动物脂肪

C.浮游微生物