It has been many years since I was last in London __I still remember something that happened during that visit.
---Mom, Jack went to the Internet cafe again!---Keep it in mind______ our family is not one______ bad behavior goes unpunished.
Although the plan hasn’t been approved______ present, he insists______ carrying it out.
Last Monday, I bought a second-hand computer, ______ was very slow.
The lecture hall______ by Doctor Li in the 1980s can contain at most 6,000 people.
That day, we______ for the train station when Tom fell and hurt his legs badly.