. More patients in hospital this year than last year.
| A．treated | B．have treated | C．had been treated | D．have been treated |
80.It was not until 1920 ______ regular radio broadcasts began.
| A．while | B．which | C．that | D．since |
81..______is a fact that English is being accepted as an international language.
| A．There | B．This | C．That | D．It |
82.I was only when I reread this poems recently _____ I began to appreciate their beauty.
| A．until | B．that | C．then | D．so |
83.I hate___ when people talk with their mouths full.
| A．it | B．that | C．these | D．Them |
84.It is theability to do the job _____ matters not where you come from or what you are.
| A．one | B．that | C．what | D．It |