选择合适的单词或短语并用其正确形式填空depend on cheer up get the hang pf1.We must try to ______ the new telephone system before we use it so that we may use it freely.2.He was unhappy at first but soon ____ after lunch.3.The sun is very important to the mankind.Man ____ it for heat and light.请翻译句子,
问题描述：
选择合适的单词或短语并用其正确形式填空
depend on cheer up get the hang pf
1.We must try to ______ the new telephone system before we use it so that we may use it freely.
2.He was unhappy at first but soon ____ after lunch.
3.The sun is very important to the mankind.Man ____ it for heat and light.
请翻译句子,
答
1. get the hang of 在我们使用新的电话系统前必须努力了解它的用法，这样我们可以运用自如。
2. cheered up 他起先不开心，但午饭后很快开心起来了。
3. depends on 太阳对人类很重要，人类靠它获取热和光。
答
1 depend on
2cheered up
3 get the hang of
答
1.get the hang of 熟悉某物的用法
2.cheered up 开心了,愉快了
3.depends on 依靠