【推荐1】To tell you the truth, there's no simple _________ （解决办法） to this problem(根据汉语提示填空)

【推荐2】The scientists are beating their brains out trying to come up with a________ (解决办法) to the problem. (根据汉语提示单词拼写)

【推荐3】Solar power may provide a more economic ______(解决办法)(根据汉语提示单词拼写)

【推荐1】In fact, more than one a________ (描述) suggests that while Newton was certainly inspired by a falling apple, there is no proof that it hit him on the head. （根据中英文提示填空）

【推荐2】The ____________(结合) of these two chemicals can cause an reaction. (根据汉语提示单词拼写)

【推荐3】After a summer here the poorest sheep and c________ grow strong and fat. (根据首字母单词拼写)

【推荐1】Once upon a time, the hunters lived in ________(山洞) and hunted for animals to live on. (根据汉语提示单词拼写)

【推荐2】Recent a_________in technology have made our future more secured. （根据首字母单词拼写）

【推荐3】She realised that one of the greatest ________(益处)of the Internet was its powerful ability to remove the distance that usually exists between people. （根据汉语提示单词拼写）