The letters for the boss________on his desk but he didn’t read them until three days later.                                                             (2012·天津,2)
#99425
A
were put
B
was put
C
put
D
has put
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If we _________ the earth, we must take action before it is too late. 
#101505
A
will save
B
are to save
C
are about to save
D
are saving
It was the third time that Jack ______ to China.
#102552
A
has come
B
has , came
C
had came
D
had come
By the time I got to the theatre, the play __________ for ten minutes.
#103201
A
had been on
B
had begun
C
have been on
D
has begun
It ________ nearly two weeks ______ I had received his letter.
#104191
A
is, that
B
was, that
C
is since
D
was, since