This is _____ best kind of _____ pen you can get here.

I can’t understand ____________ the boy alone.

Sorry，I can’t go to the theatre with youI’m________tired[ ]

By tradition, on __________ Independence Day,Americans play sports, have barbecues and hold parties throughout __________day to celebrate this festival.

Do you think Peter is free today?—I don’t think so. Recently he bas been _______ the most of his time to prepare for the final examinations.