读一读,填一填。 Mike and Lily are going to the bookstore (书店). In the bookstore, Mike wants (想要) to buy (买) a pen. He says, ' I like this pen. How much is it? ' The salesman (售货员) answers, ' 3 yuan.' Lily likes the schoolbag. She buys it. It is 40 yuan. 1. Mike and Lily buy a ___________ and a ___________. 2. Mike likes the ___________, Lily likes the ___________. 3. The pen is ___________ yuan. The schoolbag is ___________ yuan.