小华放学回家，一进门就闻到了糖醋排骨的气味，这是因为____，糖醋排骨能提供的营养素主要有____（写出一种即可），“醋”中有效物质的化学式为____．

用括号内所给动词的适当形式填空
Tom,____(not stay) out too late.
____ _______ your uncle ______ (clean) his car every week?
Tom with his brother____ (chat) with each other on the Internet now.
I usually spend thirty minutes____ (read) English in the morning.
Is it important for us____(drink) lots of water every day.
There____(not be) any calories in water. So you can drink it without getting fat.
People all like the game ____  (call)‘trick or treat’in the USA.
Players need lots of energy ____  (run) every day.oo
The boss often makes his workers ____  (work) for 12 hours.
Look! The boy____ (have) a comic book in his hand.