A.The course is for beginners. B.The daytime lessons are more popular. C.The course won't begin until August 11. D.The course is available at 10:00 a.m., 4:00 p.m. and 6:00 a.m..
【简答题】根据句意或中英文提示写出所缺单词。 1. Water covers about three quarters of the earth’s ____________.(表面) 2. _____________(though) he is very clever, he doesn’t work hard at his lessons. 3. Are you ___________ (sure) M...