问题
选择题
Health experts in many countries still _________ their ideas about the relationships between our food and our health.
A．have tested
B．tested
C．are testing
D．test
答案
答案：C
搜题请搜索小程序“爱下问搜题”
Health experts in many countries still _________ their ideas about the relationships between our food and our health.
A．have tested
B．tested
C．are testing
D．test
答案：C