What we have to admit is that never in the past thirtyyears __________ so greatly as today.

Liu Lei is_____better at Chinese than Liu Ying.

heard Back Street Boys would sing at the New Century Theatre.-Where did you _________? [ ]

They __________ with each other for two years before they got married

Do you have difficulty _________ ready for the exam —No, I have made a decision _________ over lessons this weekend.