With some technical problems to be solved, it may be a while the system is put into use.

With some technical problems to be solved, it may be a while          the system is put into use.

#33190

when

after

since

before

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It will be a long time       we reach the little town.

#33077

that

until

since

before

Seeing the policeman, the thief was behaving __________ nothing had happened.

#31932

even if

as if

now that

even though

Many of them turned a deaf ear to her advice, _______ they knew it to be valuable.

#34453

even though

now that

as if

as long as

Much as he liked the book,____he didn’t have enough money to buy it．

#31212

but

and

therefore

Goals have to be realistic ________ students can reach them and feel a sense of achievement.

#30222

so long as

so that

now that

even though

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