Bob is good at speaking English.speaking为什么要加ing.急

jim is good at jumping bob is good at jumping to 合并为一句 This is Bob ----（speak）.说明理由 Bob is good at speaking English.speaking为什么要加ing.急 Is Bob good at basketball?(改为同义句) _____Bob _____ _____ _____basketball? Paul is as good at chemistry as Bob.这句话对吗?并翻译 填空：he is good at french,he can speak it f＿he is good at french,he can speak it f＿（f开头的单词） her___(speak) English is good I'm not good ____是to speak 还是at speaking还是at speakChinese is easy to learn.I'm not good ____A to speak B to speakingC at speakingD at speak Julia is very good at languages.She (speak) four languages very well.如题 讲为什么 Kate is good at speaking Japanese.speak为什么要加ing The young man is good at ____ (say,tell,talk ,speak) A;Hello!Could I speak to Bob ,please?B;Hold-----for a moment ,please ...I am sorry he is not here ---- ----.can i ---- a message?A;yes,piease.-----is Alice .Lin Tao ,Kate and i are going to have a picnic at the West Hill this Sunday.B;Good idea!----a Bob does well in math__Susan is good at history.They often help each other.a when b while Sophie is good at using languages.She can speak and write__three languages.A.in B.on C.at D.with Is Bob Alan is good friend?(作否定回答） Your(speak)English is very good Bob is good at Physics and he is always the first( )(填finishing或to finish)the exercises.要说原因哦 Tom is good at French.He can speak very well.'is good at'可以换成下列选项的哪一个?A.does well in B.works hard atC.likesD.can speak