As Susan stared at ______ piles of plastic in her recycling bin, ______ strong sense of responsibility made her stick to her recycling work．
| A．不填；不填 | B．不填; a | C．the ; a | D．the; the |
21. After the new technique was introduced, the factory produced ______ cars in 2009 as the year before.
| A．as twice many | B．twice as many | C．as many twice | D．twice many as |
The bird hid _____ food inside trees for the winters.
| A．a number of | B．a large number of |
| C．the number of | D．a great many |
I'm wondering_____ he expects will win the gold medal in Men's Single.
| A．whom | B．which | C．who | D．what |
She asked _____ we were getting on well with our work.
| A．how | B．if | C．what | D．that |
_____ you _____ to go to watch the football match with me?
| A．Would; like | B．Would; rather | C．Do; feel like | D．Do; would like |