We’ll have to cancel the school sports meeting ___ it snows tonight.

A. if B. although C. unless D. since

When we ____ home last night, we saw a strange object in the sky.

A. drive B. drove C. were driving D. had driven

The police required the traveler ____ for his luggage.

A. check B. to check C. checking D. checked

_____ can we help victims after a natural disaster?

A. Who B. How C. Where D. When

Please ____ fruits and vegetables in a basin!

A. wash B. washing C. to wash D. washed

Half of the Beijing’s private cars ____ off the roads due to heavy smog on Friday.

A .order B. are ordered C. ordered D. were ordered

____ amazing the stage play War Horse is!

A. What B. What a C. What an D. How

–More underground lines should be built in our city!--_____

A.I’m glad to hear that B. Not exactly

C. I couldn’t agree more D. I’m on your side

–I’m sorry I’m late – the traffic was terrible.

-____. The traffic situation is getting worse these days.

A. That’s OK B. You’re welcome

C. I don’t think so D. Please go ahead.

The US public uses about 50 billion water bottles a year and most of those 1. bottles are not recycled, according to Elizabeth Royte’s book Bottlemanid: How Water Went on Sale and Why We Bought It.

More than $100 billion is spent every year on bottled water in the U.S. in many developing countries where there isn’t a safe 2. of tap water, bottled water is the only choice.

In the US, tap water is controlled by the government and often 3. for dangerous substances(物质). Each American drinks 79 litres of bottled water per year 4. . The bottled water industry is so successful that it has outpaced milk, coffee, and juice in the number of gallons of drinks sold – putting it behind only beer and soda.