当心定语从句惹祸
'请看下面一道题:The letter they were looking forward to _________ at last.A. arrived B. arriving C. had arrived D. arrive 对于此题,基础稍差的同学可能...'
地点状语从句考题透析
'请看下面一道题:When you read the book, you’d better make a mark _________ you have any questions.A. at which B. at where C. the place where D. where ...'