几道高中的英语题目1.I must leave too, I ( ) having tea with you ,Bill

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几道高中的英语题目
1.I must leave too, I ( ) having tea with you ,Bill
A was enjoying B am enjoyying C enjoyed D enjoy
2.-Did you go to Qingdao for vacation last August
-I ( ) to go ,but i got sick at the last minute
A was planning B had been planning
C planned D have planned
3 -I met him at a party,but i haven't seen him since
为什么then不能用,since是怎么用的?
4.- I think that you need ( ) practice on playing the violin
-( ) violin lessons every two weeks,but I think I'll make it every week from now on
A less; I have B less; I've taking
C more; I have D more;I've been having
分式方程怎么求最大值?
求分析. 我有答案.汗.忘记说了

1 C
2 B
3 since是从此/从这以后,而then只有那时的意思,而这里很明显是想表达从那之后就没再见过他了,所以应该是since.
Since 后面也可以加时间,表示从---之后,如since last Saturday,自从上周六之后
4 D
不知道你的最后一个问题（分式方程怎么求最大值?）是要求翻译成英文还是问数学---希望答案对你有用.

几道高中的英语题目1.I must leave too, I ( ) having tea with you ,Bill i like tea,you like tea ,too. —It is too late .I must leave now —I can not ___allow you to 几道英语时态题1.If it ___ too much trouble,i'd love a cup of tea.A i must leave now so.i.tried.to.drink.tea.with.milk.too, I always enjoy having you with can i leave parcel with you I must apologize for having you waiting for so long. I must sick with you forever的意思是什么? Would you like some milk or tea?Tea,please.I like tea with n So I thank you and I love you .But I must leave you 什么意思