Although he has failed many times, he keeps _____ hard to make his dream come true.A. working B. to work C. worked
—What does Sandy like?—She likes______ music.
—It’s time to go to bed.Betty? ..—OK,_______,Mum.
She always looks________.Now she’s looking_______ at her newdrawing.
The river is too wide for the swimmers________.
Tom has much difficulty _____Chinese so he often asks me ______help.