Choose the best answer A, B, C or D for each of the following sentences (1.0 pt).
Question 1. (TH) We ______ to a piece of music when he arrived for a novel by Leo Tolstoy.
A. listened B. are listening
C. will listen D. were listening
Question 2. (TH) _____ breaks out the food we eat and turns it into energy.
A. Respiratory system
B. Digestive system
C. Nervous system
D. Circulatory system
Question 3. (TH) Listen to the wind! We ______ a hard crossing.
A. will have B. had
C. are going to have D. were having
Question 4. (VD) The concert was exciting at the beginning, ___it became boring at the end.
A. or B. but
C. so D. and