试题详情

Before checking in the baggage, it’s best for the passenger to( ).

ng to the regulation, every passenger and his baggage shouldgo through the security check before bo

baggage search, the staff may say to the passenger,“Please takeyour baggage and have a rest at the

The best way _______ the principle is to see how it actually works in practice.

Before you put new oil in the system,it is mandatory to replace the filter.