To improve their oral English, everyone in the class is supposed to ________ actively in these discussions.
The price of diamond rings has risen sharply _______ the price of gold rings has gone down.
It is a long time since I last saw you . This sentence means _______
_______ reason you may give , you ought not to have left homework unfinished.
It seemed only several minutes _______ he finished this painting .
I’ll lend you my car _______ you return it intact.