—What do you think of it?—Well，it’s worth doing _______

—What do you think of it?—Well，it’s worth doing ________ the result is satisfactory.

#30224

the moment

as soon as

once

so long as

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I'll be out for some time. ______ anything important happens, call me up immediately.

#30003

In case

As if

Even though

Now that

She treats the boy like that     she were his mother.

#31269

as if

even though

unless

although

___ you know the rules of swimming, you will be able to swim well.

#80368

Before

While

Though

Once

Usually pilots need about a decade of experience _______ they can be promoted to captain.

#31003

after

before

then

when

．______ the satellite launch drawing near, the research workers put their hearts to the test and always stayed up late.

#33637

Because

With

While