_____ twice a year, whether it is a car or a bus, is a rule that every driver must obey in this city.
| A．Examining | B．Examined |
| C．To examine | D．Being examined |
A lot of language learning，________has been discovered，is happening in the first year of life，so parents should talk much to their children during that period.
| A．as |
| B．it |
| C．which |
| D．this |
________ that the way people spend their holidays has changed a great deal in the past ten years.
| A．It is reported |
| B．What is reported |
| C．It reports |
| D．As is reported |
________ is generally agreed that a person with good qualifications and experience should be given a better job.
| A．It |
| B．As |
| C．Which |
| D．What |
It has been proved again and again ________frequent advertising increases product sales.
| A．that |
| B．whether |
| C．because |
| D．when |
—I don’t know about you,but I’m sick and tired of this weather.
—.I can’t stand all this rain.
| A．I don’t care | B．It’s hard to say |
| C．So am I | D．I hope so |