.Someresearchersbelievethatthe

.Some researchers believe that there is no doubt ____ a cure for AIDS will be found.

A．which.

B．whether

C．what

D．that.

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相关试题

—Where are we going for the National Day,the mountains or the sea?
— Either will be fine with me.

A．Definitely!

B．It’s up to you

C．You’ve got it

D．That’s great!

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All the teachers and students _________ National Day with a party.

A．celebrated on	B．celebrated
C．congratulated on	D．congratulated

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The stones each ________ as much as two tons.

A．weighs

B．are weighed

C．weigh

D．is weighed

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________ to overcome the difficulty，he works day and night．

A．Determined	B．Determining
C．To determine	D．To be determined

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一Did he notice you enter the classroom?
一I don’t think so．He _______ to the radio with his eyes shut·

A．1istened	B．was listening
C．has listened	D．had listened

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