—Will Helen come to my party tonight? —I am not sure. She go to the cinema with her father.
He slipped(溜进) into the classroom without ___________.
This special strain of rice makes _________ possible to produce one third more of the crop in the same fields.
---Is that the small town you often talk about? ---Right, just the one ______________ you know I used to work for three years.
Although the first part of the book is easy, the rest ______.
----Where are you now? ----Well, I have arrived at _______ is called “the West lake”.