______many times, he finally understood it.
| A．To tell | B．Telling | C．Having told | D．Having been told |
The children all turned_________the famous actress as she entered the classroom．
| A．looked at | B．to look at |
| C．to looking at | D．look at |
The government plans to bring in new laws _____ parents to take more responsibility for the education of their children．
| A．forced | B．forcing | C．to be forced | D．having forced |
_________ the right kind of training , these teenage soccer players may one day grew the international stars．
| A．Giving | B．Having given | C．To give | D．Given |
Please do me a favor — ______ my friend Mr．Smith to Youth Theater at 7:30 tonight．
| A．to invite | B．inviting | C．invite | D．invited |
Nowadays people sometimes separate their waste to make it easier for it ______．
| A．reusing | B．reused | C．reuses | D．to be reused |