Mr.Bush is on time for everything.How ________ it be that he was late for the opening ceremony.
. Attention, coffee lovers! We have for you, the best coffee machine _____ invented.
---- Has he finished the work? ---- Not really. _______ he worked all day, ______ he couldn’t finish the task.
----The weather is changeable here. Please take more clothes. ---- _________.
Don’t push against one another! The woman carrying a baby, ______ in first.
The ____ bell has been repaired by an _____ engineer.