You don’t know whether the shoes fit you ________ you try them on.

You can not imagine a child ________so cruelly.

Shall we go for a drink at one o’clock this afternoon— . Will two o’clock be OK

.一What does the sign over there read?一“No person ________ smoke or carry a lighted cigarette，cigar or pipe in this area．”[ ]

Once you keep your school things________, you’ll find them easily.