According to scientists, our mental abilities begin to _____ from the age of 27 after reaching the highest level at 22.
| A．differ | B．shrink | C．fail | D．decline |
--- What do you think our guests ___________ be doing at the moment?
--- They must be enjoying themselves at the party.
| A．can | B．must | C．should | D．would |
He ______ the agreement at the meeting in public and left angrily．
| A．tore into | B．tore down | C．tore up | D．tore apart |
Although she doesn’t like to live in the country, _______ , she goes there for a picnic．
| A．once in a while | B．for a while | C．at the moment | D．from now on |
She is an easy-going girl．_______ you meet her , she will smile to you．
| A．As | B．Every time | C．While | D．Since |
I like to_______ alone about the town after supper.
| A．wonder | B．wander | C．move | D．float |