--There is still a copy of the book in the library. Will you go and borrow _____?
--I’d rather buy _____ in the book store.

Helping others is a habit，______you can learn  even at an early age.
A it           B. that          C. what         D. one

Graduation day is a very special day,        I’ll  never forget for the rest of my life.

When he took his gloves off ,  I noticed that       one had his name written inside.

—Jack said you got a unique watch for your birthday.
—Yes. Maybe it is not to the taste of      , but I like it.

Things have changed quickly over the past decade and life in the country is much better than      used to be．

__________ the reason , research shows that laughter is good for your health.

People have the belief ______ factories should produce fewer things from raw materials, ______the supply is growing smaller and smaller.

—When shall we go for a picnic, this Saturday or Sunday?
—_______ is OK. I’m free this weekend.

The sunspot came into its active stage last year,        that happens once every eleven years.