21. My neighbor is hard-working and warm-hearted. ________, I can’t speak too highly of him.
A. In other words B. In a word C. Above all D. After all
22. Teachers recommend parents _____________ their children under 12 to ride bicycles to school for safety.
A. not allow B. do not allow C. mustn’t allow D. couldn’t allow
23. It’s important for the figures ___________ regularly.
A. to be updated B. to have been updated C. to update D. to have updated
