_______ in this way can we save nature and animals, which is of great value to human beings

下列各句中，没有语病且句子表意明确的是 （ ）

The book, ________ to tell people how to learn English as ________ second language, is very helpful for beginners.

He walked ________ fast for us ______ catch up with.

In his time he enjoyed a _____ reputation ____.[ ]