A. | when | B. | where | C. | that | D. | which |
A. | must | B. | should | C. | can | D. | might |
A. | what it is that | B. | what is it that | C. | how it is that | D. | how is it that |
A. | and | B. | but | C. | so | D. | yet |
A. | shall | B. | should | C. | need | D. | can |
A. | which | B. | what | C. | where | D. | that |
A. | break out | B. | break off | C. | break in | D. | break down |