【推荐1】The hard part in our life is not making the decision but living with_________．

A．one	B．that
C．the one	D．it

【推荐2】We should do all ________ is useful to people.

A．who

B．that

C．it

D．which

【推荐3】All over the city, history and modernity come together to make _______ an essential place for tourists to discover.

A．each

B．this

C．one

D．it

【推荐1】The traffic on the main streets has a longer green signal than that on the small ones. What does the underlined "that" refer to?

A．the traffic

B．the signal

C．the street

D．the time

【推荐2】The price system is a complex network composed of the prices of all the products bought and sold in the economy as well as       of a great number of services.

A．the one

B．that

C．ones

D．those

【推荐3】By 2025, when the number of consumers worldwide has reached 4.2 billion, people with high income will be, for the first time, more than_______ struggling to meet basic needs.

A．one

B．that

C．ones

D．those

【推荐1】Someone is ringing the doorbell. Go and see ____.

A．who is he	B．who he is
C．who is it	D．who it is

【推荐3】— Are you still using your old car?
— No, I sold ___ the other day.

A．it

B．one

C．that one

D．the one