The flu is believed ________ by viruses that like to reproduce in the cell inside the human nose and throat.
#89170
A
causing
B
being caused
C
to be caused
D
to have caused
推荐题目
(2014·沧州模拟)—I regret________you John has been fired.—I can hardly believe my ears.He’s such a fine worker.
#88427
A
telling
B
having told
C
to tell
D
to have told
In the job interviews job applicants often find themselves asked unexpected questions, some very difficult ____.
#90091
A
to be answered
B
to answer
C
being answered
D
answering
We’ve come to help. Which room do you want ______?
#97422
A
cleaning
B
cleaned
C
to clean
D
to be cleaned
(2013·福建高考)________basic firstaid techniques will help you respond quickly to emergencies.
#89000
A
Known
B
Having known
C
Knowing
D
Being known
The child, who was believed _______ by a tiger, was found in a forest.
#92366
A
to be killed
B
having killed
C
to have been killed
D
to be killing