Some scientists believe that is no doubt a cure for AIDS will be found.

Some scientists believe that         is no doubt         a cure for AIDS will be found.

#93048

it; that

it; whether

there; that

there; whether

推荐题目

I saw Helen at the party last month. It _________ a year since we met last time.

#92228

was

has been

would be

He is rather difficult to make friends with, but his friendship, _____, is more true than any other.

#93359

once gained

when to gain

after gaining

while gaining

 It ___ 6 years since we left middle school.

#94587

was

had been

has been

were

 It was quite a long time      I made it out what had happened.

#94957

after

before

when

since

His mother was born in Green, and Greek was her native language, ___.

#94657

so it was with his father

so did his father

so was his father

so his father was

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