In English class, our teacher often creates an environment _____________ we are given the opportunity to solve problems ourselves.

The president spoke at the business meeting for nearly an hour without ____ his notes.[ ]

Daming hasn’t learnt singing _____ dancing.

he quality-oriented education being carried out,teachers won’ttoo much importance tostudents’ grades

I don’t know _______to do next –It’s easy .Press the red button in 2 minutes.