Just as the tree is the unit of a forest and the book the unit of a library, ______ the molecule is the unit of matter.
| A．as | B．like | C．so | D．thus |
The ________, I think, he drew from his simple experiment is not scientific.
| A．conclusion | B．charge |
| C．promise | D．relation |
They fell in love with each other _______ they met in Paris.
| A．for the first time | B．the first time |
| C．every time | D．next time |
________ of experience made John fail in the interview，but it didn't mean that he couldn't find a suitable job.
| A．Lacking | B．Lack |
| C．Lacking in | D．No lack |
Helen always helps her mother even though going to school ________ most of her day.
| A．takes up | B．makes up |
| C．saves up | D．puts up |
There are many wonderful theme parks in America, ________ Disneyland in California is my favorite.
| A．for which | B．with which |
| C．of which | D．in which |