Living in the central Australian desert has its problems, _____getting water is not the least.
The singer’s flight was _____ due to bad weather, resulting in the show _____.
As the family did not make a(n) _____ ahead of time, they had to wait at the restaurant in order to get a table.
Some people hold the view that the new machine is advanced, while others are still skeptical _____ whether it is of practical use.
According to the engineer, there remain some tests _____ before the machine is put into operation.
-- Can you lend me the book Twilight by Stephenie Meyer?-- Sorry. I returned it to the library just now. Maybe it is still _____.