同义句转换。

1. Everything is all right at the present time.

    Everything is all right ______ ______.

2. We must use the natural sources well.

    We must ______ ______ ______ ______ the natural sources.

3. A man like him will surely succeed.

    A man ______ ______ him will surely succeed.

4. Many people lost their homes as a result of the big fire.

    Many people lost their homes ______ ______ the big fire.

得热量转化为冷负荷过程中，存在着（）和延迟的现象。主要由围护结构和家具等（）决定的。