In the following passage, the first and the last parts of the sentence are numbered 1 and 6.The rest of the sentence is split into four parts and named, P, Q, R and S. These four parts are not given in their proper order. Read the parts and find out which of the four combinations is correct. Then find the correct answer and blacken the appropriate rectangle in the Answer Sheet.
1. The very first battle they fought
P. and they had to fall back
Q. cross the border
R. was lost
S. letting the enemy
6. an enter the country