29. Reading offers only material of knowledge, without thinking, however, it’s hardly possible to make ______ we read ours.
| A．that | B．what | C．how | D．It |
I’ve kept up a friendship with a girl whom I was at school ________ twenty years ago.
| A．till | B．with | C．about | D．since |
In the experiment we kept a watchful eye ________ the developments and recorded every detail.
| A．in | B．at | C．for | D．on |
Books are the most important records we keep ________ man’s thoughts, ideas and feelings.
| A．up | B．of | C．for | D．on |
I don’t think it’s fair to judge a person ________ their clothes.
| A．in | B．from | C．with | D．on |
I am anxious about what notes he made in the back of his diary ________ things to mend or replace.
| A．by | B．in | C．with | D．of |