根据句意和汉语注释,在答题卡标有题号的横线上,写出单词的正确形式。
小题1:Their _____________ (婚姻)lasted 31 years.
小题2:Designers need to do further ________(试验,实验)before the cars are made in factories.
小题3:- You look slimmer and healthier than before.
- Yes, but I _____________ (更喜欢)sweet snacks to vegetables before.
小题4:Many teenagers have little __________ (交流)with their parents.