I am tired. I ______ all day.
#104217
A
am working
B
have been working
C
worked
D
have been worked
推荐题目
– Why isn’t the recorder ready yet?--- I’m sorry, sir. It ______ in the factory.
#102923
A
is being repaired
B
is repaired
C
has been repaired
D
hasn’t repaired
 The 2014 FIFA World Cup will be held in Brazil on June 13th, 2014, and 32 football teams_____ so far.
#100543
A
will choose
B
have chosen
C
have been chosen
D
will be chosen
Hurry up, or the tickets ________out by the time we get there. 
#103485
A
will have sold
B
will sell
C
have sold
D
will have been sold