Many facts proved that long before Columbus ________ America, Chinese had visited it.
#103829
A
noticed
B
uncovered
C
discovered
D
arrived
推荐题目
Computer cannot remember who _______; it simply does what _______.
#104640
A
has used it; it is told
B
will used it; it was told
C
uses it; it has told
D
has used it; it told
By the time our teacher arrives tomorrow,all the work _____,with which he will be satisfied. 
#101348
A
is accomplished
B
will have been accomplished
C
will be accomplished
D
has been accompished