If you meet trouble, you can ______ your friends ________ help.
---Why didn’t you go shopping with me two hours ago?---Because my mother________ me outside.
---What do you think of the football match yesterday?---Really wonderful. They have never played ________.
---Can people drive after drinking a glass of beer?---No. According to the law they _________.
I really enjoyed your talk, ________ there were some parts I didn’t understand.
Food safety is important. Rules must ________ stop people from food pollution.