1.They invited the world to participate in an international exposition.
2.Polish your presentations （presentation） and deliver them enthusiastically （热情的）to the right market.
3.Try to find humour in life and engage in activities that make you laugh.
4.He had been in two minds about whether to involve (involve) himself in that business.
5.I’ll talk to them, but I won’t feel comfortable (comfort) with it.
6.We currently have six tutors (tutor) available to help students with their homework.
7.I had some difficulty at first recalling (recall) why we were there.
8.There will soon be a shortfall in supply of qualified (qualify) young people.
9.Bakker cited (cite) two main arguments to support his theory at that time.
10.The book described the adaptation (adapt) of desert species to the hot conditions.
