I have _________ told your phone number. Has he called you ________—No, he hasn’t called me _________.

This is_______ way I’ve told you about. Isn’t it_______ useful one

Why do you look so puzzled?—Oh，I ________ over a most difficult maths problem

15．We know it is hard to make such a decision____he has just built up the team for a year and the project is going through the important stage now

ow long hactually．I’m on a big journey, you know．I ______all the places ofinterest here．