You should spend more time ______ the lessons.[ ]

The number of people who speak English ______ large, and a large number of people _______ native speakers.

Mr. White , many customers want to see you._______ they wait here or outside?[ ]

__________I can see，there is only one possible way to keep away from the danger.

The weather turned out to be fine yesterday. I the trouble to carry my umbrella with me. [ ]