At the edge of the grass，there's a sign saying“________ the grass”．
| A．Keep up | B．Keep away |
| C．Keep off | D．Keep back |
----You must find one exam after another very tiring.
---- ________. In fact, they offered me good chances to apply what I had learned.
| A．It’s up to you | B．Not in the least | C．It just depends | D．Don’t mention it |
We tried hard, and eventually, we were able to get Mike ____us his car just for a day.
| A．lending | B．lend | C．to lend | D．lent |
Susan started to clean the room; __________Lily was preparing lunch.
| A．however | B．but | C．meanwhile | D．when |
----Why are your hands so dirty?
----I ____________in the garden.
| A．was working | B．have worked | C．worked | D．have been working |
---Why not open the windows to let _____cool air in?
---I’d rather you didn’t. ________air in out town is terribly polluted.
| A．a; The | B．/; The | C．/ ;/ | D．the; / |