Scientists ______ thousands of chemicals before they decided on the right one in the end.
| A．tried out | B．found out |
| C．worked out | D．turned out |
Most young people don’t want _____ the kind of life that their parents ______.
| A．to lead; used to live | B．living; used to live |
| C．to live; used to living | D．leading; used to live |
There is no need for you to look up every new word you ______ when reading. You have to learn how to guess the meanings of new word according to the context.
| A．come up with | B．come out | C．come along with | D．come across |
Measures have to be taken to teach young people how to ______ themselves both in family and in school. They don’t know the basic manners.
| A．do | B．perform | C．behave | D．work |
Do you know
that with wise men improves your mind?
| A．chat | B．chats | C．chatted | D．chatting |
The house rent is expensive. I’ve got about half the space I had at home and I’m paying________here.
| A．as three times much | B．as much three times |
| C．much as three times | D．three times as much |