从方框里选出合适的单词，并用其正确形式填空.

hand，master，reach，rescue，tie，treat

（1）a.Man is the

master

master

of his own fate.
b.It is by no means easy

to master

to master

a foreign language.
（2）a.Do you know the man wearing a

tie

tie

over there？
b.When I passed by his house，I saw that the dog

was tied

was tied

to a big tree.
（3）a.My homework

was handed

was handed

in the next morning.
b.The man is always willing to lend me a

hand

hand

when I get into trouble.
（4）a.Judy

reached

reached

into her handbag and handed me a small card.
b.Don't leave the medicine within the

reach

reach

of your kids.
（5）a.Fortunately，all the passengers trapped in the bus

were rescued

were rescued

.
b.No one came to his

rescue

rescue

when he got lost in the valley.
（6）a.Don't worry about the cost-it's my

treat

treat

.
b.The man

was treated

was treated

as a hero when he was set free from prison.