April 21 was the national memorial day ____ were killed in Yushu Earthquake on April 14 2010.A in honor of any one who B in celebration of those whoC in memory of whoever D in charge of no matter who
Another food crop raised by Indians ______ was strange to the European was called Indian corn.
______ with a gradual rise of seawater, some nations in the Pacific are considering moving in the near future.
No driving after drinking is a rule that every driver ______ obey in our country.
Restaurants in every corner of Tianjin not only provide job opportunities but ______ lots of taxes.
--- When did you last see your first teacher? --- On ______ Friday last June, at ______ celebration of her 40th year of teaching.