The president spoke at the business meeting for nearly an hour without ____ his notes.
| A．bringing up | B．looking for | C．referring to | D．trying on |
30. More than 20 years ago he was badly wounded in the anti-Vietnam war. Since then he can only walk _____ an arm-chair .
| A．in | B．on | C．by | D．Over |
29. Can you say _____ certain when he will come here?
| A．at | B．for | C．with | D．In |
28. He is too careful _____ his money; he never buys a drink for us.
| A．to | B．at | C．for | D．With |
27. You should write the first letter of the sentence _____ capital one.
| A．on | B．with | C．in | D．At |
26. I called _____ you last night, but you were out.
| A．with | B．on | C．at | D．in |