The population now is much ______ than that 20 years ago.
A. large B. larger C. largest
Mariah used to_____ interested in music, but now she’s used to ____tennis.
| A．be, playing | B．being, play |
| C．be, play | D．being, playing |
He _____ when the UFO arrived.
| A．was sleeping | B．were sleeping |
| C．has slept | D．is asleep |
How long did it take you _____ the classroom yesterday.
| A．to clean | B．clean | C．cleaning | D．Cleaned |
My uncle spent three months_____ a new house.
| A． build | B． built |
| C． building | D． to build |
Remember to ____the lights after school．
| A．turn on | B．turn up |
| C．turn down | D．turn off |