Most experts agree that washing hands regularly is a ______way to prevent the spread of many diseases.
一Did he notice you enter the classroom? 一I don’t think so.He _______ to the radio with his eyes shut·
I think it’s impolite to play ______ trick on others just for ______ fun
I have bought two ball pens ,______ writes well.
—— Oh, it’s raining hard outside. Mum, do you think the milkman will come? —— Of course. He will come on time _____it rains.
Jane likes collecting stamps very much. In fact, her interest in it ___ back to her school days.