The purpose of new technologies is to make life easier, _______ it more difficult.
| A．not make | B．not to make | C．not making | D．do not make |
No one helped me . I did it all myself .
| A．for | B．by | C．from | D．to |
Don't try to get off the bus ____ it has stopped.
| A．while | B．as | C．since | D．before |
To understand the grammar of the sentence，you must break it______ into parts．
| A．down | B．up | C．off | D．out |
He will tell you about it ____ you get there.
| A．while | B．as | C．when | D．/ |
The classroom is big enough , but we’ll have to move if we have more students.
| A．for the moment | B．on the moment | C．in a moment | D．for a moment |