What do you usually do _____ Sundays?—We enjoy ourselves at the guitar club.[ ]

I would appreciate _______ you could give me some advice on TOFEL test.

How long can I have your dictionary?— it till next term.

A: Listen! Is it Linda singing in the next room? B: No, it __________ be her. She is still in Shanghai.

_____is it?—It’s 20 yuan.[ ]