Mr. Lin is ___________ at repairing hard wares.
31. Einstein didn’t care for money. Once he used a check _____ $1000 as a bookmark and then he lost it.
30. More than 20 years ago he was badly wounded in the anti-Vietnam war. Since then he can only walk _____ an arm-chair .
29. Can you say _____ certain when he will come here?
28. He is too careful _____ his money; he never buys a drink for us.
27. You should write the first letter of the sentence _____ capital one.