It is said in the book that Tomas Edison （1847-1931） _______ the world leading inventor for thirty years．
#103208
A
would be
B
has been
C
was
D
had been
推荐题目
With the development of modern society, E-mail as well as telephones an important part in daily communication.
#101452
A
have played
B
is playing
C
are playing
D
played
— Has Yang Liping returned from Yunnan yet? I’d like to meet her.— Sorry. She ____ back here only for last weekend.
#101370
A
has been
B
would be
C
had been
D
was
Professor Wang ________in our school till next Sunday．
#102722
A
will have stayed
B
has stayed
C
is staying
D
stayed
This is the second time that you ______ the Summer Palace.
#100197
A
visited
B
have visited
C
had visited
D
are visiting
For 800 years Oxford and Cambridge universities ______ in everything from Nobel prizes to boat races.
#101163
A
competed
B
had been competing
C
have competed
D
compete