In the past,ice ______food.
#104372
A
used to keep
B
used to be used for keeping
C
was used to keeping
D
used to be used to keeping
推荐题目
----How long can I keep the book? ----A week．You _____to return it by Monday．
#103244
A
expect
B
will expect
C
are expected
D
will be expected
I had wanted to help you last night but I couldn’t spare any time．for I_____an essay that is due this morning．
#103305
A
wrote
B
had written
C
was writing
D
have written
---Stanly has graduated from the university. ---It’s no wonder that I can’t see him these days. He ___ in the city for six years.
#103578
A
has stayed
B
had stayed
C
stayed
D
has been staying
Great as Newton was, many of his ideas _______ today and are being modified by the work of scientists of our time.
#102473
A
are to challenge
B
may be challenged
C
have been challenged
D
are challenging
．But for the storm, we ______ earlier．
#103802
A
can arrive
B
will arrive
C
had arrived
D
could have arrived