The reason why I burst into tears is _________ I don’t want to part with my mother.
--- What are you busy with? ---The exhibition ____ in the city next week.
---Jack can't concentrate on his study recently. --- Yes, that might ____ why he did so badly in the last test.
I can hardly remember any occasions ____ I get caught in a traffic jam in our town.
Holiday shopping ___be a tiring experience.There are so many places to visit and choices to make.
If a book is in French, ____ will be a challenge for me.