1. (2019九下·温州竞赛) 用方框中所给单词的适当形式填空，每词限用一次。

welcome   including   remain   low   business

1. （1） We are going to take many courses in the middle school, math, English and science.
3. （2） Lauren was left alone because his parents went on  for a couple of days.
5. （3） It's said that we can buy things at a  price in Yiwu Trade City than any other place.
7. （4） Customers  with a bright smile by the owner when they step into the store.
9. （5） I  in London for at least one month, but still have no idea what London looks like.