21. Your performance in the driving test didn’t reach the required standard. ____, you failed.

A. In the end   B. After all   C. In other words  D. At the same time

22. This box is _____ that one.

A. twice more heavier than         B. twice heavier than

C. twice as heavier as             D. as twice heavy as

23. Mr. Smith has been here for only a few days, so he hasn’t left a deep impression _____ us.

A. on    B. with    C. about   D. for