It won’t be a very long time _________ he is in business for himself.
A．untilB．whenC．beforeD．that
C

試題分析：考查固定句型：it will/won’t be long before…，用不了多久就…，句意：用不了多久他就會有自己的生意了。選C。
點評：固定句型：It was+一段時間+before…，要多久…就（才）…，在考試中出現(xiàn)的很多，容易混淆的句型是it is/has been 一段時間since從句（過去時）；自從…以來，已經(jīng)有一段時間了。區(qū)分的時候，一是從句意判斷，還有就是根據(jù)主句的時態(tài)區(qū)分。
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