急！~~~~@几道英语单项选择，会者请进！！

如下，做了好几遍总是说有错，请大家帮忙啦！~~！（如果能说上选项的原因，另给加分！）
1.I want you to say______about this subject.
A.anything new B.new anything
C.something new D.new something
2.Milk is good_____our_____.
A.to;healthy B.to;health C.for;healthy D.for;health
3.Thank you very much for______us to well.
A.teach B.teaching C.teaches D.taught
4.-______students in yours class are form Beijing? -Only one.
A.How often B.How many C.How much D.How
5.-______do your grandparents come to see you? -Twice a week.
A.How often B.How many C.When D.How
6.Most students in my class______exercise every day.
A.does B.do C.is doing D.are doing
7.He knows a lot______he is still a child.
A.so B.although C.but D.or
8.It______you about 15 minutes to walk there.
A.take B.takes C.spends D.spend
9.______is not difficult to have a healthy lifestyle.
A.This B.It C.That D.Its
10.-______is the post office？

1.C（肯定句用SOMETHING，形容词放在不定代词后）
2。D（BE GOOD FOR，对。。。有好处，MY是物主代词，后面加名词）
3。B（介词后加动名词）
4。B
5。A
6。B
7。B
8。B
9。B
10.C
11.C
12.B
13.A
14.A
15.A
额、没耐心了

1.C (anything用于否定) 2.D (be good to对某某态度好)3.B 4.B 5.A (how often与频率有关）6.B(表示习惯性动作用一般式）7.B(尽管他还是个孩子）8.B
9.B 10.C 11.C(finish doing sth) 12.B(be going to do打算做某事）13.B
14.A 15.A(表示感谢）
补充说明13题：on用于哪天，on sunday；in用于早晚，in the morning；at用于时刻，at10:00

1.c，不定代词要放在形容词之前。some用于肯定句。
2.D，be good for对...有益。后一空应该填名词，所以用health。
3.B，for为介词，介词后加动词的ing形式。
4.B，根据答语可知，是问有多少学生，而students为复数，所以用how many
5.A，根据答语可知，是问频率，提问频率用how often
6.B，every day为一般现在时，students为复数，所以用do
7.B，“他知道很多 他是个小孩”根据这个意思判定，前后句表转折，所以应该用“虽然”连接。而表示“虽然”的词是although
8.B， It takes sb. some time to do sth.
9.B，It is＋adj.＋to do sth.
10.C， 根据答语，可知是在问路程多远，问多远用how far
11.C， finish doing sth.
13.B，四季，早晚前的介词用in
14.A，十分中之前的正确表达形式为，ten minutes ago