Excuse me II was blocking your way.
—Did you have any difficulty catching yesterday’s lecture?—No. The professor spoke very clearly to make his speech easy _____.
After months of voyage, Columbus arrived in _____ later proved a new continent.
—Do you think our team will win the game?—I don’t know. But this is the last chance. We _____ them to.
____ our natural resources is very necessary.
_____ is known to us all is that the old scientist, for _____ life was hard in the past, still works very hard in his eighties.