1. Because of the heavy rain, we couldn't get out to enjoy the film.
`->`Because of + N/N phrase/V-ing
`->`Because of = because: bởi vì
2. I'll be busy working during your holiday.
`->`during: suốt trong
3. They all took a part in singing the Christmas carols.
`->`take part in: tham gia
4. My brother likes scuba-diving, so am I.
`->`Mệnh đề khẳng định, so + tobe/trợ động từ + S
5. I hope I'll see you at the airport.
`->`CT: S + hope + S + will + V-inf: Ai đó mong ai sẽ làm gì đó