I’m sorry I didn’t phone you, but I’ve been very busy ____ the past couple weeks.
--- Hi, Grandma, why do you look so tired? --- I’m tired. I _______ the cleaning all morning.
_______ , he didn’t attend the meeting.
While standing there, I found the strange eyes _____ me.
_______ the night they had prepared a lot of wonderful programmes.
Wang Hua has a better command of English _________ to make such mistakes.