根据句意填入单词的正确形式：
1.My brother is two years _older__(old)than me.
2.Tom is as __fat_(fat) as Jim.
3.Is your sister ___younger____(young) than you?Yes,she is.
4.Who is ____thinner_______(thin),you or Helen?Helen is.
5.Whose pencil-box is ___bigger_______(big),yours or hers?Hers is.
6.Mary’s hair is as ___long_______(long) as Lucy’s.
7.Ben ___jumps___ (jump) __higher______ (high) than some of the boys in his class.
8.___Does_____ Nancy sing ____better______ (well) than Helen?Yes,she _is____.
9.Fangfang is not as ___tall______ (tall) as the other girls.
10.My eyes are __bigger________(big) than _her_______ (she)..
11.Which is ____heavier_______(heavy),the elephant or the pig?
12.Who gets up ___earlier______(early),Tim or Tom?
13._Does____the girls get up__earlier_____(early) than the boys?No,they__aren't____.
14.Jim runs _slow____(slow).But Ben runs _slower____(slow).
15.The child doesn’t__write____(write) as _fast___(fast) as the students.