----- Hi, Tracy, you look tired. ------ I ________ the living room for three hours.
#101812
A
painted
B
had painted
C
was painting
D
have been painting
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(2013·高考北京卷)—Do you think Mom and Dad________late?—No，Swiss Air is usually on time.
#99710
A
were
B
will be
C
would be
D
have been
She ______ on a new novel ever since this summer and it is supposed to ______ at the beginning of 2011.
#102453
A
had worked; be published
B
had been working; have published
C
has worked; publish
D
has been working; be published
—Has Sam finished his homework today?—I have no idea. He ________ it this morning.
#104746
A
did
B
has done
C
was doing
D
had done
A red light will start continuously flashing when the batteries____ low.
#101986
A
get
B
will get
C
are getting
D
got
Do you know what ___ while you were away from home?
#103912
A
had happened
B
was happened
C
has happened
D
happened