So sánh số lượng đồng phân của anken C4H8 và C4H10? Giải thích

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F. WRITING XV Make meaningful sentences based on the given words below. 1. People/very/ willing/ donate/ charity. ...................................................................................................................... 2. Stop/ eat/ sweets/ night/ if/ you/ not/ want/ have/ toothache. ...................................................................................................................... 3. Dave/be/ fond/ skiing/ since/ he/ move/ Australia. ...................................................................................................................... 4. I/ really/ enjoy/ play/ musical instruments/ but/ I/ not/ have/ much/ free-time/ that. ...................................................................................................................... 5. Do/ exercise/every/ day/ very/ effective/ way/ keep fit/avoid/ diseases. ...................................................................................................................... XVI Rewrite the following sentences based on the given words. 1. He is crazy about beach volleyball. → He is........................................................................................... (fan) 2. What she fancy doing is to ride a bicycle around the park in the afternoon. → She is.......................................................................................(keen) 3. My grandfather needs to have a surgery. His heart problem is very serious. → My grandfather...............................................................................(for) 4. Lam has participated in many volunteer campaigns up to now. → Lam............................................................................................... (part) 5. They started to raise funds to help disable children in early 2009. → They...........................................................................................(since)