l __swim when l was ten years old.(can/could)有助于回答者给出准确的答案

l __swim when l was ten years old.(can/could)有助于回答者给出准确的答案 when l was 是什么意思 when l was twelve that boy was able to swim well when he was four .（同义句） that boy __swim well when he was 4. His parents hunted for him everywhere when he was l i heard a l() voice when i was sleeping 求When l was in primary school,l got into.完形填空的答案 When l was eight,l took an i_____ in the piano.(i后面填什么） He is very Strong and handsome.l was nervous when l sat close to him when l was young ,l always run a____ with ma brother. when l was only ten years old ,l could run 50metres in 10 s( ) when l left l have regretted doing someting l should have done.when l was look her note.my heart is broken.l fell so upset. l always miss you when l along 英语Someone knocked at the door when l (was watching) TVSomeone knocked at the door when l (was watching) TV怎么不是watched When l passed the next room,l heard someone --- Chinese in it.A.readingB.was readingC.readD.reads为什么 Not until then___that he was mistaken,when actually gave me much trouble.A.did l realizeB.had l realized when l was young,l used ...(swim) in that river.用所给动词的恰当形式填空.