Nowadays, biologists tend to believe that humansA．occupy the top of the food chain.B．inhab

The jobs of wildlife technicians and biologists seemed ______to him, but one day he discov

The biologist, the philosopher, and the astronomer all try in their ways to understand the

Helping strangers used to be considered as a virtue. But nowadays people tend to be very c

Nowadays, young people tend to celebrate western traditional festivals, such as Valentines

Nowadays, a husband tends to______.THE GREATEST RECENT SOCIAL CHANGES HAVE BEEN IN THE LIV

You could always______him to settle an argument, no matter what was being discussed.A．beli