When asked why he prefers bikes to buses, the professor said,  “Riding a bicycle takes __________ half an hour, but it’s more convenient and environmentally friendly. ”

Anyone, whether he is an official or a bus driver, should be ______ respected.

Yesterday I was walking downstairs when I missed my foot and had a bad fall, nothing serious, ______.

It is the prevention of disease_____ its successful treatment that has led to the rapid increase of the world’s population.

It seems that living green is _______ easy and affordable. A small step makes a big difference.

Everything has gone smoothly with the project so far. __________ it’s believed to be completed on time.

I wasn’t blaming anyone: I ________ said errors like this could be avoided.

— So you missed the meeting．— ______. I got there five minutes before it finished.

It is believed that high achievers work toward personal standards of excellence ______ material rewards.

The three-year-old girl’s behaving _____ at the table surprised all the other guests and won her a lot of kisses.

He has made        progress that we all praise him．

The following years are _______to see a rise in production.

When I saw my teacher nodding _______ to me, I calmed down and went on with my performance.

“I think the tie beautiful,” I said, “A man can never have ______ many ties.”

－Have you been to Liuyang?  －No, I'd like to, _______. 

It seems that living green is ______ easy and cheap. A small step can be rewarded with long-term benefits.

It is reported that ________ 8,000 torchbearers will take part in the London Olympic Torch Relay. 

It’s always difficult being in a foreign country, ________ if you don’t speak the language.

-We need an immediate reply. –I see . I’ll send the paper to you_____.

Laura wanted to play a joke on her father but gave herself________by laughing.