Mimosa, 15 cm in height, is a sensitive small plant, which will close when ____.
A. touching
B. touched
C. is touched
D. to be touched
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Lei Feng was a person who was only too ready to help others, seldom____, refusing them when they turned to him.
A. if never
B. if ever
C. if not
D. if any
--Those senior citizens treated should have been warned of illegal fund-raising.-- ____. But few could resist the temptation.
A. They were
B. They should
C. They must
D. They did
Although ____ by the opposite team, the players were not discouraged but practiced harder.
A. beating
B. beaten
C. having beaten
D. being beaten
They finished their work earlier than ____.
A. expected
B. expecting
C. to be expected
D. being expected