聽(tīng)完plastic,聽(tīng)這個(gè),正好能接上點(diǎn),講了塑料不導(dǎo)電,所以每個(gè)電線接頭是塑料的。Wide range of cross-curricular
topics in graded English Attractivephotos, charts and diagrams helpunderstanding In every book:
activities and projects for languageand learning skills Flexible designallows both free reading and
supported reading Picture
Dictionary (levels 3 and 4) and
Glossary (levels 5 and 6) offer extrasupport Audio in both American
and British English Excellent
teacher materials Fiction partner