Cars do cause us some health problems — in fact far more serious _______ than mobile phones do.
A.one B.ones C.it D.those
70. -Do you like ___ here?
-Oh，yes. The air，the weather，the way of life. Everything is so nice.
| A．this | B．these | C．that | D．it |
71.The Parkers bought a new house but ____ will need a lot of work before they can move in.
| A．they | B．it | C．one | D．which |
72. I hate___ when people talk with their mouths full.
| A．it | B．that | C．these | D．them |
73.Joan had often heard____ said that Marley had no money.
| A．it | B．this | C．that | D．one |
74.Was it during the Second World War_____ he died?
| A．that | B．while | C．in which | D．then |