I worked as hard as I could _______ for the final exam.
| A．to prepare | B．prepare | C．preparing | D．prepared |
When the news came ________ the war broke out, he decided to serve in the army.
| A．since |
| B．which |
| C．that |
| D．because |
There is clear evidence ________ the most difficult feeling of all to interpret is bodily pain.
| A．what |
| B．if |
| C．how |
| D．that |
Evidence has been found through years of study ________ children’s early sleeping problems are likely to continue when they grow up.
| A．why |
| B．how |
| C．whether |
| D．that |
At our factory there are a few machines similar to _______ described in this magazine.
| A．them |
| B．these |
| C．those |
| D．ones |
The traffic on the main streets has a longer green signal than _______ on the small ones.
| A．one |
| B．this |
| C．that |
| D．it |