Ⅰ.用所给词的适当形式填空，并体会其意思
1．They often________(bath)themselves in the pool.
2．They are________(sing)a wonderful song.
3．She is______(nurse)a newborn baby carefully.
4．We should________(face)the difficulties in front of us bravely.
5．The goods were________(ship)to Australia by a large ship.
