It suddenly occurred to him __________ he had left his keys in the office.
| A．whether |
| B．where |
| C．which |
| D．that |
_____ the rapid development of agriculture in China, the output of grain, fruit, vegetables, and milk has sharply increased, which contributes to the drop in their prices.
| A．As | B．For | C．With | D．While |
If I can help ______, I prefer living in Hangzhou because the weather here is better than ______ of Wuhan.
| A．that; that | B．it; that | C．that; one | D．it; it |
Do you remember it was on ______ Saturday night that you saw such ______ bright moon?
| A．a; a | B．the; the | C．a; the | D．the; 不填 |
Never before______ so highly successful in his attempts to forecast the weather accurately on a small scale．
| A．man has been | B．man is | C．has man been | D．will be man |
Yesterday I had a word with the CEO of the company, ___ who used to teach at Beijing University．
| A．one | B．the one | C．that | D．it |