[文法] toefl grammar!

[kelp (kelp)]

At its center, the sun has a density of over a hundred times

________  and a temperature of 10 to 20 million degrees centigrade.

a. that of water

b. of water

c. than that of water

d. water

請問答案是哪一個？又～為什麼啊？

看的霧煞煞...先謝謝解答的好心人～

謝謝～

--
※ 發信站: 批踢踢實業坊(ptt.cc) 
◆ From: 61.224.52.128
推 Whitman:Is the answer "c"? @@
推 annacam:我猜a (小聲)
推 breedofelse:我推B
推 gianni:c: density對that (density), 不是對"water"
→ gianni:oops, a. over不加than
推 hanway:a
→ styno:答案為c,than前可加副詞，不一定要加比較級
→ styno:我錯了，答案應為a，這裡的over是修飾one hundred
推 stefany:答案是a, over 不需要加than