__________ the reason , research shows that laughter is good for your health.

---Have you got used to the Chinese food, Robert?----Yes, but I don’t like ______ when a Chinese host keeps serving me the food I don’t like.  

Generally speaking, clothes made of man-made materials is less comfortable than _____ made of natural fibers like cotton, wool or silk.

Make sure you’ve bought a towel and a bucket, and      for the cleaning.

I took ＿＿＿for granted that he would believe in us.