1．It’s the first time the painting has been________________ (展览)to the public.
2．Columbus discovered America but did not ________________ (探索)the new continent.
3. ________________(登记)of new students takes place on Monday.
4．The beautiful sunny morning put him in a happy________________(心情)．
5．It’s difficult to find a________________(解决办法)that we can all agree on.
