The Internet celebrated its birthday on September 2nd, by which time 40 years _______ since the first successful transfer of data between two computers.
#103284
A
has passed
B
had passed
C
passed
D
have passed
推荐题目
—— Why? Tom, your shirt is so dirty! —— Mum, I ＿＿＿＿＿ my storeroom downstairs。
#104641
A
cleaned
B
have worked
C
was cleaning
D
have been cleaning
Over the past decades, sea ice _______ in the Arctic as a result of global warming.
#104854
A
had decreased
B
decreased
C
has been decreasing
D
is decreasing
Although the causes of cancer ________, we do not yet have any practical way to prevent it．
#103264
A
have uncovered
B
have been uncovering
C
are uncovering
D
are being uncovered
— I hope you enjoyed the film last night. — How on earth do you know I went to a film? I _____ you.
#104306
A
won’t tell
B
didn’t tell
C
haven’t told
D
hadn’t told