求教885-19-16

16.         Bihar
is India’s poorest state, with an annual per capita income of $111, lower
than in the most impoverished countries of the world.

(A) lower than in

(B) lower than
that of

(C) and lower than
that of

(D) which is lower
than in

(E) which is lower
than it is in

请问which什么时候可以省什么时候不可以？如果选项是“which is lower than that of”,是否可选？

）23.         A
new phenomena, which is visible at Managua’s major intersections, are waves of
vendors and beggars, which include many children and mob cars at the
stoplights.

(A) A new
phenomena, which is visible at Managua’s major intersections, are waves of
vendors and beggars, which include many children and

(B) Visible at
Managua’s major intersections are waves of vendors and beggars with many children,
new phenomena that

(C) A new
phenomenon （省略that is）visible at Managua’s major intersections is waves of vendors and
beggars, many of them children, who

(D) Phenomenally
new waves of vendors, beggars, and many children are visible at Managua’s major
intersections, which

(E) A wave of
vendors and beggars, many of whom are children, are visible at Managua’s major
intersections, where they are a new phenomenon and


此题选C，如果按照我前面的16题的形式，在此处加两个逗号，把visible at Managua’s major intersections变成插入语，那此时which is也是可以省略么？（语感上可以，但希望找到理论依据的说。。和和。。），如果按照lower than that of正确的话，这里就应该是对的了？。。。。In one word，在加逗号的情况下，先行词什么时候可以省略？多谢多谢！

(C) A new
phenomenon，（which is/that is） visible at Managua’s major intersections， is waves of vendors and
beggars, many of them children, who

那此时which is也是可以省略么？（语感上可以，但希望找到理论依据的说。。和和。。），如果按照lower than that of正确的话，这里就应该是对的了？。。。。In one word，在加逗号的情况下，先行词什么时候可以省略？多谢多谢！