The true traveler sets out to make an independent, unhurried journey to the unknown, travelling ________ few people have set foot.
To go abroad to study, you should __________ master the language.
I hadn't seen him for 10 years but I __________ him at first sight.
-How about the book you are reading now?-Excellent indeed. You can find many problems we have come across __________ in it.
If it had rained even a drop, things would be much better now and the crops in the fields __________.
A lot of people often forget that oral exams __________ to test our communicative ability.