找规律填数．

10+11+12+13+14=______×______=______

23+24+25+26+27=______×______=______

210+220+230+240+250=______×______=______．

用所给单词的适当形式填空。

1.At about eight o'clock, the teacher began to _______ (teach) us how to learn English.

2.I _______ (receive) a special gift last night.

3.There must be someting that _______ (happen) yesterday.

4.Why didn't you _______ (invite) Xiao Ming to come here?

5.I _______ (sleep) when the teacher came in.