Bears often hide themselves in places _______ can’t be found by hunters.
| A．which | B．in which |
| C．what | D．where |
I’d like to study law at university ________ my cousin prefers geography.
| A．as | B．though | C．while | D．for |
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 |
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 |