Cloning humans has been _____ in the science world for many years and it is likely to continue .

I can’t find my cat, _______ a blue cat, ________ ears are small.

A year ________12 different star signs.

________，as long as I’m with nature，I don’t care.

need to give a tip if I eat at a fast food restaurant in theUnited States —Yes, it’s a common ______ to tip waiter in arestaurant