A:Many people are wearing coats.
B:The weather must be_________getting cold____________.
A:Sally has been coughing a lot.
B:She might be___________catching / having a cold_________________.
A:This restaurant is always very crowded.
B:The food_____________is delicious________________________.
A:Whenever I try to read this book,I feel sleepy.
B:It can't_______________be helped_____________________.