There is a traffic jam, Mr Zhang is late for school.

Luckily, we’d brought a road map without _____ we would have lost our way. [ ]

r your instruction, I ______ such great progress in so short a time. Thanks a lot.

The thief the office while no one was looking. [ ]

The traffic is heavy this day, I ____ arrive a bit late, socould you save me a place?[ ]