"Hello! Long time no see!"
This is idiomatic, it would be more helpful to make the hover-over hints select the whole phrase "Long time no see" and give the hint "好久不见". The status quo is incomplete, as there is nothing in the hints that shows "好".
Having whole-phrase-level hints is the way the more mature courses like German do it, and I think it leads to a superior learning experience. Can someone fix this soon? Thanks!
If you're using a chinese keyboard to type in you answers and they keep getting rejected even though they are correct, it's likely that your keyboard uses western encoding for your punctuation. You may need a new keyboard.
For those of you using the pinyin Samsung keyboard, if you use the punctuation in the autocomplete bar, the answers are accepted.