Ten years ago the population of our village was _________ that of theirs.
| A．as twice large as | B．twice as large as |
| C．large as twice as | D．as twice as large |
David is such a good boy _______ all the teachers like him.
| A．that | B．who | C．as | D．whom |
David is such a good boy _______ all the teachers like.
| A．that | B．who | C．as | D．whom |
______ is mentioned above that the number of the students in senior school is increasing.
| A．Which | B．As | C．That | D．It |
_____ is mentioned above, the number of the students in senior school is increasing.
| A．Which | B．As | C．That | D．It |
_______ is known to everybody that the moon travels round the earth once every month.
| A．It | B．As | C．That | D．What |