It is one thing to enjoy listening to good music, but it is quite ______ to perform skillfully yourself. 

Due to bad weather we have to put ___ off until next week to go camping in the mountains．

I like_________ when the teacher says that my work is satisfactory ________.

一Which T—shirt do you like best?一     ．They are both out of fashion and expensive．

The dress of this kind doesn’t suit me．Would you please show me ______ one?

Playing a sport is      more than feeling tired．There are ____ effects that you feel after you play it．

_______ of my classmates could work out the maths problem because it was too difficult. 

Charles Darwin, a young man just out of university, knew perfect well that he had to depend on _____ when he set out on a voyage of discovery around the world. 

They found there was_____ to weigh such an elephant.

The conflict between Gadhafi’s government army and the rebels in Libya made ______ difficult for the foreigners to leave the country.

Cars do cause us some health problems—in fact far more serious ________ than mobile phones do.

—Which of those electronic dictionaries do you like most? —        . They are both expensive and of little use.

The ladies would appreciate ______ if you could do them the favor to solve the two problems.

—How many students passed the math test? — ________, for it was too much for them.

—Was the test you took yesterday easy?—          but easy, but I did my best.

I would appreciate        you could come to my birthday party.

---Have you bought any dress while shopping? ---I am sorry to tell you when I tried on all the dresses in the shop and _____ satisfied me.

What! ________ to go there with _______?  No!

---Mary’s skirt is a real bargain.---_____ must be in a secondhand shop that she bought it.

The volunteers will do _______ to help those injured in the earthquake.