In winter, it is dangerous to go to school with snow ______the ground.
| A．cover | B．to cover | C．covering | D．covered |
I'm lucky because my job has_____hours, and I can come and go pretty much as I want.
| A．changing | B．flexible | C．basic | D．moveable |
Don’t be too general. Please give a ______suggestion on how to deal with this difficulty.
| A．concrete | B．abstract | C．complete | D．fragrant |
--Which color do you prefer, red or black?
---Red. For red_____a sense of energy and strength.
| A．delivers | B．conveys | C．contributes | D．concentrates |
_____ your advice, I would have had no trouble with my papers.
| A．Had I followed | B．If I followed | C．If I have followed | D．Once I followed |
_____ their inexperience， they’ve done a good job.
| A．Given | B．To give | C．Giving | D．To have given |