24. —Hi, Alice, you look tired.
—I am tired. I__________ the living room all day.
| A．painted | B．had painted |
| C．have been painting | D．have painted |
It even leaves the scientists in _______what they should call the newly born creature, which looks half-human and half-animal.
| A．phenomenon | B．motivation | C．wonder | D．consequence |
Doctor Lily has made her projects successful, so we suggest not only _______ to her old school but also give the students a talk then.
| A．did she come | B．her coming | C．should she come | D．she should come |
I don’t have money or time in hand; _____, I can’t accompany you to the Parkson Mall today.
| A．in a word | B．in other words | C．by the way | D．in this way |
In order to keep the balance of ecosystem, every possible means _______to deal with the problems of the over-exploiting of natural resources.
| A．has tried | B．has been tried | C．have taken | D．have been taken |
We all thought that Betty could have run _______ if she had worn the sports-shoes that day.
| A．even faster | B．more slower | C．much quickly | D．still fastest |