On account of fuel supplies being finite and many people being wasteful, we will have to install ________ solar heating device in our home.

Unlike a stage actor, a film actor must be able to perform small scenes out of ________ and often days apart in time.

The rainiest said, “We are ready for discussion with any legal parties, but we’ll never    with enemies.”

Mr. Brown’s condition looks very serious and it is doubtful if he will ________.

 —Will you read me a story，Mummy?—OK.You ________ have one if you go to bed as soon as possible.(2011·陕西)