–Is this your ruler? – Yes, it’s ________

I found ___________ hard to remember all the twelve star signs because they are difficult to pronounce(发音) and spell. 

下列表示重量单位的是______.

–Does your sister like red?–Yes. This red skirt belongs to ______.

–Excuse me, Mr. He, are you free? Lin Tao and I want to tell you _____.     –Sure.