However,inrecentyears,NiagaraF-优题课

However, in ________ recent years, _________ Niagara Falls have come to be appreciated more for their natural beauty as _________ wonder of Nature.

A．/; the; a

B．the; /; the

C．/; the; /

D．the; /; a

科目英语题型单选题难度中等

Many people have donated that type of blood; however, the blood bank needs ______.

______ with care, one tin will last for six weeks.

When deeply absorbed in work,he often was, he would forget all about eating or sleeping.

George said that he would come to school to see me the next day, but he.

Jerry did not regret giving the comment but felt ______ he could have expressed it differently.