________ I can see, there is only one way to solve this problem.
| A．As far as | B．Even if |
| C．As long as | D．As soon as |
You can only be sure of _____ you have at present; you cannot be sure of something _____ you might get in the future.
| A．that; what | B．what; / | C．which; that | D．/; that |
The traditional view is _____ we sleep because our brain is “programmed” to make us do so.
| A．when | B．why | C．whether | D．that |
We arranged to meet at the cinema at 7:30, but he failed to ______.
| A．turn up | B．turn on | C．turn out | D．turn over |
Miss Green contributed fifty dollars, but she wished she could contribute _____.
| A．one other fifty dollars | B．the same amount also |
| C．more fifty dollars | D．another fifty |
When _____ different cultures, we often pay attention only to the differences without noticing the similarities.
| A．compared | B．being compared | C．comparing | D．having compared |