注: --前为原句,--后为改后的答案:1. went on trip --went on atrip 2.a hillside then --a hillside whensb. be doing sth. when ...固定搭配,"某人正在做某事,这时突然..." 3. were rolled -- rolled 4. serious--seriously5.so was mine--so did mine6. Waving our hand--Waving our hands7. we were all sent --we were both sent 8. on time--in time9...
