I just don't understand_____________ that prevents so many Americans from being as happy as one might expect．
| A．why it does | B．what it does |
| C．what it is | D．why it is |
the weather ,the sports meet will be held on time .
| A．Instead of | B．In relation to | C．Regardless of | D．In favor of |
In front of the farmhouse ______.
| A．lay a poor man | B．laid a poor man |
| C．a poor man lay | D．did a poor man lie |
＿＿＿＿ Sunday, the students are at home.
| A．Being | B．To be | C．It is | D．It being |
Most animals have little connection with animals of a different kind ,they hunt them for food .
A. if B while C. unless D. as
In face of failure , it is the most important to keep up good state of mood .
| A．/ ; a | B．a ; / | C．the ; / | D．/; the |