—Do you know when Britain ______war on Germany during the Second World War?
—In 1993，I suppose.
| A．announced | B．declared | C．fought | D．attended |
33．Only after he had spent several nights working on the math problem_______to wonder whether the problem was wrongly set．
| A．did he begin | B．he began | C．he did begin | D．began he |
32．—Why are you so sweaty?
--- I__________football with my classmates and how I want to have a drink!
| A．was playing | B．had been playing | C．have played | D．Played |
31．______weather it is, we shall set out at 8o'clock．
| A．Whatever | B．Whenever | C．However | D．No matter |
30．Some children want to challenge themselves by learning a language different from____spoken by their parents at home．
| A．what | B．that | C．which | D．one |
29．Lucy had to shout ___________on the noisy street．
| A．making herself hear | B．to make herself hear |
| C．making herself heard | D．to make herself heard |