Ⅰ.语境填词
1．You can join the class if your parents ________ (同意)．
2．We have finished all necessary ________ (准备)．
3．The gold watch has been handed down to their children from one ________ (一代) to another.
4．Nowadays ________ (挑选) a mobile phone for personal use is not easy because technology is changing rapidly.
