Question

We can do a lot to stay healthy. __________, we should eat a balanced(平衡的) diet.

A．At a time

B．In fact

C．First of all

D．All together

Answer 1

C

词语辨析。句意：为了保持健康我们做了很多。首先，我们应该保持饮食平衡。根据句意可知，C符合题意。