She told me that it had been worrying her much ________ her hair was turning gray.

e get closer to the moon, we shall feel itsgravity pulling us, but it will not be ________ the earth’s.

Sir, you _______ be sitting in this waiting room. It’s for women and children only. [ ]

aoyu islands, in the East China Sea betweenChina and Japan, _______ to China since ancient times.

The good thing about children is that they ______ very easily to new environments．