The world’s population has grown to more than six times ________ it was in 1800.

A. which   B. that   C.  what     D. the number

The world’s population has grown to more than six times ________ it was in 1800.

A. which　 B. that　 C. what　　 D. the number

--- I hate cities. The roads are dirty and they are always crowded.

---Do you know the world’s population has grown to __________________?

A. more than six times what it was in 1800

B. six times more as what it was in 1800

C. more than six times large as it was in 1800

D. more than six times as large as in 1800

—I hate cities . The roads are dirty and they are always crowded.
—Do you know the world’s population has grown to_________？
more than six times what it was in 1800
six times more as what it was in 1800
more than six times large as it was in 1800
D. more than six times as large as in 1800