The time has come _____ we make extensive use of nuclear energy.
A、WhenA
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The speed ____ Tom drives his car is too high.
We'd better eliminate junk foods from our kitchen and keep a variety of high-quality foods_____ at all times.
Ifhe____ontouristsforhisbusiness,hewouldhavetoclosehisshop.
Mary keeps talking about the party.She had a very good time,______she?
The bike ____ he went to school was stolen last week,which made him feel sad.
