for the first time，jump out of，at the end of，around the clock，apply for，in advance，engage in，check in
（1）People who do very important jobs sometimes have to work
around the clock
around the clock
.
（2）I'd appreciate it if you could let me know
in advance
in advance
whether or not you will come.
（3）We are now
engaged in
engaged in
a great and most glorious cause，never undertaken by our forefathers.
（4）Passengers with hand luggage can go straight to the departure gate to
check in
check in
there.
（5）The minute you
apply for
apply for
insurance，carriers have the right to dig through your medical records.
（6）I don't think I'd have the courage to
jump out of
jump out of
a plane.
（7）Peter will take up his post as the head of the travel agency
at the end of
at the end of
next month.
（8）Naturally，you were nervous when you went on the platform
for the first time
for the first time
.
