It is reported that the water in the river is becoming worse and worse, the river around the city ____ with waste from factories.
His writing is so confusing that it’s difficult to make out ________ it is he is trying to express.
—Which one of these do you want?—________. Either will do.A. I don’t mindB. I’m sureC. No problemB. Go ahead
Scientists study ________ human brains work to make computers.
________ can be good at something for 40 years if he doesn’t love it.
Mrs Smith finds it hard to clear up the mess, as her children are always ________ whenever she tries to.