1)
2 joining
3frezing
4to read
5 the less comfortable
6 saw
2)
1 putting thành to put
2 đúng
3 can thành must
4soccer thành football chắc thế:)
5climbing thành climb
3)
1spoke thành spoken
2 had thành have
3 would thành may
4slowly thành more slowly
5 đúng