问题

_ they are seeing great development, they are still poorer than many countries in other parts of the world.

A:Unless
B:Since
C:While
D:As;

正确答案是：

同类题型

下列各句中加线的解释不正确的一项是

He often makes his sister .

Chinese must have the largest number of speakers, ________ ?

The time of the last term , ________full use of ________the college entrance examination , will be very important to every senior three student ．

Great efforts to increase grain production _____ if food shortages are to be avoided. [ ]