问题

Leaders of many countries have been trying to ______ what it is that makes China develop so fast.

A:carry out
B:figure out
C:watch out
D:go out

正确答案是：

同类题型

It was also in 1964 ______ Martin Luther King Jr received the Nobel Peace Prize for his great contribution to the world peace.

下列各句中没有语病的一句是

— _________— Thank you I certainly will

When _____ the abacus _____– In the sixth century by the Chinese people.

There ____ a pen and two pencils in the pencil case.