Scientists are trying to modify tests which were firstly developed for children to test dogs.（ ）

• A、True

• B、False

• C、Not Given 

According to the passage, average dogs can learn 250 words.（ ）

• A、True

• B、 False

• C、Not Given 

How does a woman go about 41___(buy) clothes?In almost every aspect she does so in the way opposite to a man. Her shopping is not often 42___ (base) on need. She has never fully 43___ (make) up her mind what she wants, and she is only "having a look round." She is always open to 44___ (persuade); indeed she sets great store by what the saleswoman tells her, even by what 45___ (companion) tell her. She will try on any number of things. Uppermost in her mind is the thought of 46___ (find) something that everyone thinks suits her. Contrary to a lot of jokes, most women have an excellent sense of value when they buy clothes. They are always on the lookout for the 47___ (expected) bargain. Faced with a roomful of dresses, a woman may  48___(easy) spend an hour going from one rail to another, to and from, often retracing her steps before selecting. It is a 49 ___(labour) process, but the shopping time passed 50 ___(pleasant).