定语从句之“介词+which/whom”的定语从句练习一 用适当的“介词+which/whom”填空：1. There is a rocket motor _______ _________ the direction of the satellite can be changed.2. What does a household look like _______ _________you have one parent who has to work, or two parent...

时间:2025-03-29 09:28栏目:行业资料