-- Do you still remember when we went to Nanjing?
--- I can’t remember now but _________ sometime last summer?
| A．might it be | B．could it be | C．could it have been | D．should it have been |
________is well known to us all is ________Yao Ming has become one of the most popular NBA players.
| A．It；that |
| B．As；that |
| C．What；what |
| D．What；that |
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 |