下面哪一组字母的顺序是正确的。
Alice, is this your pen? I need one to write down the name of the book. — No, it isn’t . ________ is over there on the desk.
_____chapter in Oxford English often consists of four parts.—That’s right.And this chapter mainly talks about _____environmental problems.
____ I swim here?—I’m sorry. Children ____ swim alone here..
Linda, I called you this morning, but nobody answered the phone.—I’m sorry. I football with my friends then.