问题

Professor Jordon is well known for his_____ into the habits of the common housefly.

A:examination
B:introduction
C:research
D:expression

正确答案是：

同类题型

Only by studying hard ________ improve her Englishsoon.

om needs _______,so he must have it________.

It’s time________ lessons. But Lily isn’t in theclassroom.

.No matter how fast we worked,____.

I’m 1.70 metres. Yao Ming is 2.27 metres. I am ______ Yao Ming.