英语时态 词性转换 急1.when l entered his office,he____to fix a TV set

英语时态 词性转换 急
1.when l entered his office,he____to fix a TV set.(try)
2.when l got back they____down most of the houses in the street.(pull)
3.Our teacher told us that earth____(turn)round the sun.
4.if it____(not rain)to morrow,l'll go swimming .
5yesterday my friend ,Leilei,____(fall)off from the bike and _____his leg.(break)
6l'm sorry l forgot ______(post)your letter.
7he____to China two yaers ago.he_____in China for two years.(来）
8my brother ___the League in 1988.he____the League for three years.
he______a member of the League ifor three years(入团）
9the professor______in beijing for three years by then.(stay)
10they finally decided_______(not go)