I didn’t manage to do it _____ you had explained how.

 I didn’t manage to do it _____ you had explained how.

#94719

until

unless

when

before

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There is no doubt ______ smoking can seriously damage our health.

#93557

that

whether

why

which

There were _____many people there _______I wasn’t able to pick her out.

#93446

such; that

very; that

such; who

so; that

There is no doubt ________ Tom is a good clever boy.

#93495

whether

when

that

 Don’t forget it’ll be the first time ____ in public

#94859

I’ve spoken

I shall speak

I will speak

I speak

Tom pretended ______ it；but in fact，he knew it very well.

#94834

not to listen to

not to hear about

not to have heard about

not to be listening to

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