The activities organized by our school really gave usa platform ____ we learned team spirit.

Will they send their homework _____ the teacher _____ email—Yes, they will.

The school survey showed that the students’ attitudes to how to deal with difficulties in life widely. [ ]

There is no doubt, in my opinion, ________matters is not the speed, but the quality of the products. [ ]

I think I have ________ my key in the car.