单项选择题
A．He didn’t like physics any more. B．His eyesight was too poor. C．Physics was too hard for him. D．He had to work to support himself.
A．To protect persons and property. B．To collect taxes. C．To teach and train citizens. D．To save natural resources for future use.
A．Ask Tom to send an invitation. B．Get the Johnsons’address. C．Invite Tom to the party. D．Tell Tom to pick up the Johnsons.