The two students practice spoken English______ joining the English club.

It _____ have been Tom that parked the car here, as he is the only one with a car. [ ]

We rushed to the football court, only to see a sign _____ into the ground reading PERIODIC MAINTENANCE (定期维修).

The visitors here are greatlyimpressed by the fact that _______ people from all walks of life are workinghard for _____ new Chengdu.

Mr. Green is 70 years old , helooks young.