Not only John and Tom but also their sister, Mary, ______great interest in the piano lessons.

If nothing______, the oceans will turn into fish deserts.

—When did the computer crash?
—This morning，while I ________ the reading materials downloaded from some websites.(2012·福建)

Excuse me.I ________ I was blocking your way.

My parents ________ in Hong Kong.They were born there and have never lived anywhere else.

(2013·遼寧，22)He was unhappy when he sold his guitar.After all，he________it for a very long time.

(2013·山東，27)—Oh no! We're too late.The train________.
— That's OK.We'll catch the next train to London.

(2013·湖南，34)—I don't understand why you didn't go to the lecture yesterday afternoon.
—I'm so sorry.But I________my homework.

(2013·湖南，26)If nothing________，the oceans will turn into fish deserts.

(2013·湖南，22)“What do you want to be？”asked Mrs.Crawford.“Oh, I________president，”said the boy, with a smile.