---Do you often stay up?
---No. I always get a good night’s sleep _______ much work I have to do.
| A．whenever | B．however | C．whatever | D．whichever |
Every time ______ I see the picture there, I think of my days in a remote mountain village.
| A．when | B．while | C．as | D．/ |
Almost all the students were having classes when the earthquake _________.
| A． broke out | B． put out | C． came out | D． got out |
______ more attention, the tree could have grown better.
| A． Given | B． To give | C． Giving | D． Having given |
Tom, you _____ leave all your clothes on the floor like this!
| A． wouldn’t | B． mustn’t | C． needn’t | D． may not |
We have to work hard, ______ we’ll lose the chance.
| A． therefore | B． otherwise | C． besides | D． however |