(2013·吉林长春高中毕业班第一次调研)As the immune system weakens, it loses the ability ________ illnesses.
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A
fighting
B
fought
C
to fight
D
to be fought
推荐题目
After completing and signing it, please return the form to us in the envelope ________.
#94941
A
providing
B
provided
C
having provided
D
provide
Professor White has received a letter ___ to give a lecture in Peking University.
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A
to be invited
B
being invited
C
invited
D
inviting him
When I opened the door, I found my father ______ in his chair, completely ______ in a magazine.
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A
seated; absorbed
B
seating; gathered
C
sat; losing
D
sitting; concentrated
Lady Gaga has put off her concerts because of the difficulties ______ by the ongoing strikes.
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A
causing
B
to be caused
C
caused
D
to cause
Whenever she saw the young man, she would feel her heart __________.
#96079
A
striking
B
beating
C
hitting
D
knocking