1,Uncle Albert was visiting his sister Eve in the big city."

1,Uncle Albert was visiting his sister Eve in the big city."While I'm here,"he said,"I'll call at the hospitaland visit young Tommy.After ll,he's a sick little boy,and I am his uncle.""Well",said Eve,"I'm certainly not his aunt.So I'll just go and do some shopping."
Can you explain(解释）：（ ）
2,1um=( )m,1nm=( )m,4nm=( )um=( )mm=( )cm=( )m.
3,Fred finds a pile of letters.They are A-F-T-E-R-N-O-O-N,He is thinking,"How many words can I make with these letters?"He finds the words"a"and"to",but there are more.Can you make 20 words with these letters?( )
4,I leave home at twenty-five to nine this morning.It takes me a quarter of an hour to walk to school.What time do I get there?( )
5,A film starts at twenty past eight this evening.A bus leaves the bus stop at the end of the road at seven minutes past eight.It takes me eight minutes to walk to the bus stop.What time do I have to leave home?( )
6,A lessons at my school starts at five past nine.The lessons is there quarters of an hour long.There's always a five minute braek before the next lesson starts.What time does the next lesson start?( )
大家会做哪一题就做哪一题.

1,Uncle Albert was visiting his sister Eve in the big city."While I'm here,"he said,"I'll call at the hospitaland visit young Tommy.After ll,he's a sick little boy,and I am his uncle.""Well",said Eve,"I'm certainly not his aunt.So I'll just go and do some shopping."
Can you explain(解释）：（Eve is Tommy's mother）
2,1um=( 10的-6次方)m,1nm=(10的-9次方 )m,4nm=( 4*10的-3次方)um=( 4*10的-6次方 )mm=(4*10的-7次方 )cm=(4*10的-9次方 )m.你的u打错了 应该是μ
3,Fred finds a pile of letters.They are A-F-T-E-R-N-O-O-N,He is thinking,"How many words can I make with these letters?"He finds the words"a"and"to",but there are more.Can you make 20 words with these letters?(1 a 一个
2 an 一个
3 after 之后
4 noon 中午
5 afternoon 下午
6 ear 耳朵
7 tear 眼泪
8 near 在 附近
9 fear 害怕
10 eat 吃
11 neat 整洁的
12 tea 茶
13 ear 耳朵
14 on 在...上
15 to 到...
16 at 在...
17 too 也
18 no 不
19 fate 命运
20 rate 比率
)
4,I leave home at twenty-five to nine this morning.It takes me a quarter of an hour to walk to school.What time do I get there?( 8:50 )
5,A film starts at twenty past eight this evening.A bus leaves the bus stop at the end of the road at seven minutes past eight.It takes me eight minutes to walk to the bus stop.What time do I have to leave home?(before 7:58 )
6,A lessons at my school starts at five past nine.The lessons is there quarters of an hour long.There's always a five minute braek before the next lesson starts.What time does the next lesson start?(9:55 )