Jack spends two hours _______________ his homework

os, Premier Li delivered a speech in which he ______ that peace must be treasured just like we treasure our eyes.

The shopkeeper promised to get all the ordered fridges ______ to the customers within three days [ ]

His writing is so confusing that it’s difficult to make out ________ it is he is trying to express.(2011·安徽)

The form cannot be signed by anyone ____ yourself[ ]