It is reported that the scientists in Europe are _____ all possible ways to control it.
I climbed the stairs slowly with a big suitcase, my fatherwith two more.
I ____ have been there, but I ____ not find the time.
____ is known to all is ____ Diaoyu Island is part of China.
----Where does your father work, Lucy? ----In England. But he _____ in France for 8 years.
It is many years ____ we enjoyed ourselves on the great occasion.