The manager, ______his factory’s products were poor in quality, decided to give his workers further training.
| A．knowing | B．known | C．to know | D．being known |
After he had said good-bye to Jack, Tom ______ a bus and left the town.
| A．got down | B．got on | C．got into | D．got off |
When I entered the classroom, I saw the students _____ in their seats.
| A．sitting | B．are sitting | C．sat | D．to sit |
I would really _____ it if you could offer me the chance to study abroad.
| A．thank | B．make | C．like | D．appreciate |
I wonder how he _______ that to the teacher.
| A．dare to say | B．dare saying | C．not dare say | D．dared say |
My grandfather spends most of his time _______ because he loves nature.
| A．outdoor | B．outdoors | C．indoor | D．indoors |