He stepped into the office, _____down and began to fill in the forms.
| A．sitting | B．to sit |
| C．sat | D．having it |
He stepped into the office, _____down and began to fill in the forms.
| A．sitting | B．to sit |
| C．sat | D．having it |
试题篮
()
粤公网安备 44130202000953号
