下列各组字母中全部是元音字母的是 ____。A. a, e, o, r B. a, i, u, e C. o, u, e, n
—What did he ask on the phone just now? —He wanted to know _______.
I never doubt ______ the science museums are worth_______.
People overweight need more water than thin people .
—I want to know ________ I can take the No. 101 bus because I need to visit my sick friend in Ganzhou. —Across from the bookstore.
— I can’t decide __________or not I should encourage my son to be a volunteer. — Why not? It will make him more helpful.