1. He (计算)the costs of his (可移动的)phone very carefully.
2. Such problems are a (普遍的)feature of this kind of (火箭).
3. Do you know when the first (人造的)satellite of America was launched?
4. We can (解决)the problem no matter how complicated it is.
5. I read love stories as an escape from (现实).
6. (个人的)computers are cheap and getting cheaper.
7. My efforts to (探索)the cave ended in (彻底的)failure.
