Can you imagine what problem may ________ when human beings are cloned?
A.raise | B.cause | C.arise | D.lead |
_)I had not believed in falling in love with somebody at first sight_______I met David on Valentine’s Day three years ago.
A.when | B.unless | C.if | D.before |
_—Did you visit the Summer Palace?
—No.We could have, _______we spent too much time shopping.
A.so B but C.ecause D.though
_______is often the case,he succeeded in this examination again.
A.What | B.So | C.Which | D.As |
_ _______broken,the glass can not hold water.
A.Once | B.After | C.On | D.Though |
_I had just started back for the house to change my clothes_______I heard voices.
A.as | B.when | C.after | D.while |