天地武魂包了多少电影:求教英语句子——同义句转换

来源:百度文库 编辑:高校问答 时间:2024/05/10 12:26:37
同义句转换
It takes him half an hour to write this letter.
He____ half an hour ____ this letter.

应该是spended , on/writing
时态才正确

spend ; on

spends, on或
spends, doing

spend ; on

He spends half an hour on this letter.
OR
He spends half an hour (in) writing this letter.

He spends half an hour on this letter.
He spends half an hour (in) writing this letter.