1.Why has no one from other planets sent us _________ (信息)?
2.They __________ (更喜歡) life On Mars.
3.I think they're keeping it __________ (秘密).
4.With so many stars in the universe,are we __________ (單獨(dú)的)?
5.You can _________ (借) it.
1.They have lived here for 10 years.（劃線部分提問）
________ ______ have they lived here?
2.It has taken him two hours to draw the picture.（同義句轉(zhuǎn)換）
He has _________ two hours _________ the picture.
3.Kate has already read the book.（改為一般疑問句）
_____ Kate read the book _________?
4.Mary has already saved some money.（改為否定句）
Mary _______ saved ________ money yet.
5.Astronauts have already been to the space station.（劃線部分提問）
__________ have astronaut ____________?