The plane lost control all of _______ sudden and crashed in________ forest 30 miles away from the Capital Airport.
| A．the, a | B．a, a | C．/, the | D．a, / |
—They are quiet，aren't they?
—Yes.They are accustomed ________ at meals.
| A．to talk | B．to not talk |
| C．to talking | D．to not talking |
The news of ________ greatly made us surprised a lot as he was indeed very excellent.
| A．not his having elected | B．not his being elected |
| C．his not being elected | D．his not having elected |
________ the program，they have to stay there for another two weeks.
| A．Not completing | B．Not completed |
| C．Not having completed | D．Having not completed |
The country has already sent up three unmanned spacecraft，the most recent ________ at the end of last March.
| A．has been launched | B．having been launched |
| C．being launched | D．to be launched |
The children went home from the grammar school，their lessons ________ for the day.
| A．finishing | B．finished |
| C．had finished | D．were finished |