When the old man _______to walk back to his house，the sun________itself behind the mountain．
| A．was starting；hid | B．had started；had already hidden |
| C．had started；was hiding | D．started；had already hidden |
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 grow 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 |