问题

______ the paper on the computer, the electricity was suddenly cut off[ ]

A: While typed up
B: While typing up
C: While he was typing up
D: he was typing up

正确答案是：

同类题型

what is your brother able——–

His whole school education _____ only 2 years because of his illness.

I’ll never forget the most wonderful holiday ________ we stayed in the country with my grandparents.

_______ you know English well, you can go traveling in western countries without difficulty[ ]

explosionatacoalminekilledatleast62workersandleftanother13missing.—Yes,_________newscameas________shocktousall.