Какие есть оплошности в предложениях? 1) The accident happened when they

Какие есть оплошности в предложениях? 1) The accident happened when they were driving home. 2) The crowd was cheering when the referee blew the final whistle. 3) I didn39;t recognize her at first because she had changed so much. 4) The police stopped her on the motorway because she wasn39;t wearing seat belt. 5) Some of the players weren39;t listening while the coach was talking to them. 6) We didn39;t can use the ski slope because it hadn39;t snowed enough. 7) They didn39;t able to play tennis because they hadn39;t booked a court. 8) The player got a yellow card because he had taken off his shirt.