1 . Poems that are easy to understand are often less interesting than those that constantly reveal deeper and previously unrecognized meanings. （翻译句子）

2 . 课本原文填空。

In addition to the     1     benefits, aerobic exercise has     2     benefits. People who exercise aerobically often say that they feel thirty percent less     3     than they did before they began exercising. The aerobics boom seems to have attracted people who have not     4     been     5     to get much exercise. You don't have to join a class or pay money to get aerobic exercise.

7 . She bought an apartment at the top of the building two months ________ (previous). （所给词的适当形式填空）

9 . A recent film The Croods takes us back to a________(previous) undiscovered age known as the Croodaceous period,when Mother Nature was still experimenting. （所给词的适当形式填空）