Since the baby milk powder was found to be polluted, there has been universal doubt _____ other food products are safe _____.
17. They don’t think advertisements are useful for our daily life, .
16. He hasn’t come yet. What do you think__________to him?
15. The teacher spoke____of Tom, because he is the only student who can fly the kite in the sky.
14. All the electrical equipment_____will be equipped in the office great importance to us.
13. Would you please tell me the quickest way_______English well?