【題目】Scientists say we will have no water to drink _________ we protect water resources.

【題目】I don’t think he will take pride in his son’s achievement, _________?

【題目】Mum always tells me _________ any food when I have dinner at home.

【題目】The organization is considering _________ some money to victims of the natural disaster.

【題目】Nowadays many new taxi apps（打車(chē)軟件）_________ to help people travel around more easily.

【題目】I _________in London for many years, but I’ve never regretted my final decision to move back to China.

【題目】Tom had learned more than 100 words_______ the age of five．

【題目】Traveling by car is _________ not reliable because of too many cars during the rush hours.

【題目】Save and protect natural resources, _________ we’ll run out of them in the near future.

【題目】Fifty percent of my monthly pocket money _________ spent on entertainment.