I’ m tired out. I ______ all afternoon and I don’t seem to have finished anything.
#99393
A
shopped
B
have shopped
C
had shopped
D
have been shopping
推荐题目
（2010·重庆模拟）—Alice, you look puzzled．Haven’t you understood it? —Yes．I _____of another problem just now．
#102848
A
had thought
B
have thought
C
thought
D
was thinking
In the past several weeks, many cities in Northern China from heavy fogs and severe cold.
#99857
A
had suffered
B
have been suffering
C
were suffered
D
suffered
It was for the first time that the two countries ______ an agreement.
#100479
A
reached
B
have reached
C
had reached
D
will reach
–Why do you know so much detail about the accident? --I ________ a walk nearby when it happened.
#99509
A
had
B
had had
C
was having
D
would have