用所给动词的正确形式填空
1.Weoftenhavedifficulty___(learn)EnglishGrammar.
2.Theirparentsaskhim___(nottalk)tostrangers.
3.Bythetimehewasfive,he____(start)playthdpiano
4.Manyyoungtrees____(plant)inourcitythreeyearsago
5.Theotherday,Ihadmyhair____(cut)
6.WhenIwasyoung,mygrandfathertoldmethesun____(rise)intheeast
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