找斑竹解决2个语法怪题

杀手

1． In jazz music, a riff is a simple melodic figure, _________ and repeated several times.

(A) usually one or two measures lasted

(B) lasted one measure or two usually

(C) is lasting one or two measures usually

(D) usually lasting one or two measures

2． 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

我分别选了B  D

但答案是D   A      究竟该怎样该    万分感谢!!!!!

nickt

2) a hundred times 后可直接跟名词.到GMAT语法区可以找到相关解释.http://forum.chasedream.com/dispbbs.asp?BoardID=23&ID=32064

1)在语法大全(可下载)中看到过.