It’s _________ hard problem for the twins that ________ of them can work it out .

As the day of the examination _____, almost all of the students are busy making preparations.

The baby’s room can be _____to a study room when he grows up and goes to school. [ ]

It’s the fifth time ______ late this term

I feel grateful to you for your help with my English, Amy. — It’s my pleasure. ______