He cannot get that contract. It is a wild goose chase. (Meaning close to the idiom underlined)

The idiom ‘ivory tower’ approximately means :

Give the meaning of the following phrase get at.

Replace the word underlined by right phrase given:

Since the weather is bad, we will cancel the meeting arranged for this evening

The idiom  'To read between lines'  means:

Bring out the meaning of the idiom in the following sentence :

We shall fight tooth and nail for our rights.