It’s very kind _____you to help me with mylessons. It is hard ____ me to learn them well .

________you never plan to visit the polar bears in the North Pole or the penguins in the South Pole，now it is the proper time to start thinking about that

I think the company may not offer you a good pay—_______, I won’t take the job

Which is __________, traveling by air or by train

We all ________ that they will win,for members of their team are stronger. [ ]