known to all, YangLiwei has become a space hero is we haveexpected．

Nowhere else in such a small town,I think, _______ a book as good as this one.

下面加粗字解说正确的一项是

Your bedroom is very dirty. Please________ at once.

How often do you have a school trip this term— ________ Since several accidents happened to some schools, all the school outdoor activities have been asked to stop.