Question

Food safety issues, ____ will seriously affect the growth of teenagers and even the nation’s future.

A．if not solved properly

B．not if solved properly

C．if solved properly

D．not if properly solved

Answer 1

A

考查非谓语动词。根据句意，此处应为否定，排除C. 非谓语动词的否定词not应放在非谓语动词的前面，故排除B和D. 故A项正确。等于if they are not solved properly,  ….。