Which of the following sentences doesn’t  contain(包含) an object clause(宾语从句)?
#38136
A
Many people believe robots will do most of our work.
B
Scientists should be able to develop plants that grow on Mars.
C
People think that humans on Mars have to wear special boots to make themselves heavier.
D
We all know the next Olympic Games will be held in Beijing.
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—I can’t find Mary. Where’s she?—Sorry, I don’t know ______.
#38998
A
where has she been
B
where she has been
C
where has she gone
D
where she has gone
Hobo doesn’t know ____________ .
#38385
A
when to do
B
what to do
C
how to do
D
where to do
—I’d love to make friends with the boy ____ you think is easy to _____.—OK. I’ll introduce you to him at the party.
#79308
A
who; get on with him
B
whom; get on with
C
whom; get on with him
D
who; get on with
 I _______ you if I find my uncle’s phone number.
#37644
A
tell
B
told
C
will tell
D
have told
–Do you know________ , Mike ?  --On May 12th , 2008 .
#39264
A
when the earthquake took place in Wenchuan
B
when the earthquake has taken place in Wenchuan
C
when did the earthquake take place in Wenchuan
D
when the earthquake will take place in Wenchuan