We may find that learning a foreign language does not have to be________learning our mother tongue,but can in fact be twice ________.
For some students, the computer serves only _____ a tool that is used to play games.
_____ is no doubt _____ Jennifer will come to see me this weekend as usual.
The parents are _____ their son who has been away from home for days.
The book, _______ is blue, is mine.
_____ the watch and see if you can find out what’s wrong with it.