enjoy ourselves
have fun
2.at the beginning of
3.walking根据汉语意思完成句子。 这节课开始时我们要唱首歌。 We'll sing a song at ___ ___ ___this class. 用所给词的适当形式填空 His grandfather enjoys ___ (walk) in the park.好了！Go ___ (cross) the bridge and you can find it. 讲一下上面几题为什么这么做？at the beginning 在..开始时enjoy+doingacross这个填介词