Mary ________ as a secretary in this company for twenty years and now she stays at home taking care of her own garden.
#99208
A
has served
B
had served
C
is serving
D
served
推荐题目
With the help of high technology, more and more substances _________ in the past years.
#101033
A
discovered
B
have discovered
C
had been discovered
D
have been discovered
--Nancy is not coming tonight. --But she ___________ !
#104347
A
promises
B
promised
C
will promise
D
had promised
Nothing but some ancient Chinese coins _______ in the sunken ship since they began the exploration.
#102516
A
were found
B
was found
C
have been found
D
has been found
The Internet connection for the entire area _________ when there was a sudden power cut yesterday.
#102345
A
lost
B
was lost
C
had lost
D
had been lost