E-books first appeared in the 1990s and have made great improvements in their thechnology什么意思their technology指谁呢?

When were books first _____________(发明) E-books first appeared in the 1990s and have made great improvements in their thechnology什么意思their technology指谁呢? E-books的音标是什么? what may first appear to be economical ,may not in reality ,be accurate?翻译 The first signs of the dawn appear on the horizon.里sign单数为什么加s,appear三单为什么不加s? appear you appear naive, 英语改错When we are tired from studying or working,home is the first word appear in our minds.appear 为什么不是改成to appear而是改成appearing?序数词后面不是用不定式吗? E-books will eventually replace printed books?辩论题 if e-books can replace books?i thank can we must read the books first.改成一般疑问句.急, Of the two books ,the first one is ___ (interesting). What are the first four books of the New Testament? He a___ to help us with the wall newspaper at first,but he didn't appear inthe ciassroom at all. I 'm in no_____that he'll appear sooer or later.(wrong/hope/first/ point/care/doubt)括号中选哪一个 behind it first.I will put your books on the bookshelves behind it(cd) first. 英语词性转换的题目求助Let's finish the job in the__________time(short)We must e careful when we cross the road because__________comes first(safe)Books can bring us_________(happy)We bought some_______to make our rooms more beautiful(decora appear to appear是什么意思