With April 18’s railway speedup, highway and air transport will have to compete with _____ service for passengers. [ ]

If you are traveling_ thecustoms are really foreign to your own，please do asthe Romans do.

— How about the book you are reading now?— Excellent indeed You can find many problems we have come across ________ in it[ ]

If a book is ______, we should try to read it attentively.

Eating too much fat can _____ to heartdisease and high blood pressure.