._____from heart trouble for many years, his father has to take some medicine with him wherever he goes.
| A．Having suffered | B．Suffering | C．Suffered | D．Being suffered |
Having introduced the new equipment，the company turned out ________ in 2009 as the year before.
| A．as three times cars |
| B．three times as many cars |
| C．as many cars as three times |
| D．three times more cars than |
Joining the firm as a clerk，he got rapid promotion，and ________ as a manager.
| A．ended up | B．dropped out |
| C．came back | D．started off |
Unfortunately，at least 20 miners were killed,22 ________ and 13 ________ in the coal mine gas explosion.
| A．injuring；trapping | B．injured；trapped |
| C．injured；trapping | D．injuring；trapped |
—Where did you find the wallet?
—It was at the stadium ________ I played football.
| A．that | B．where |
| C．which | D．there |
The development of industry has been ________ gradual process throughout ________human existence，from stone tools to modern technology.
| A．不填；the | B．the；a |
| C．a；不填 | D．a；a |