n as his teacher begins lecturing, he begins todoze off, not intentionally but _____.

enery in Sanya looks ________,especially "Tian Ya Hai Jiao" is ________

The building which _____ now will be our science laboratory

___he is very young, ___he can do many things.

Whydidn’tyou go to play football with us yesterday afternoon? —I_____my mother with the housework then.