（1）Translate the following expressions into English.
起航，航海

sail

sail

獨領風騷

clueless

clueless

退出，撤出

quit

quit

在手頭，可供使用

at hand

at hand

伸出，伸展

extend

extend

在...指揮下

under the direction of

under the direction of

作為...的報答

as a reward for

as a reward for

為...的利益

for the benefits of

for the benefits of

依我看來

in my opinion

in my opinion

形成基礎

form a foundation

form a foundation

（2）Complete the sentences with the proper forms of the expressions in （1）.
Injured in the leg，the horse had to

quit

quit

the race by its owner.
Busy as he is，the fifteen-year-old boy always

extends

extends

to those in need of help.
The ship，loaded with relief supplies from the citizens，finally

sailed

sailed

.
At that time his albums gained great popularity and he was

clueless

clueless

.
Take a deep breath and focus on the task

at hand

at hand

.
The research group are carrying out their experiment

under the direction of

under the direction of

Professor Green.
He treated me to a big meal

as a reward for

as a reward for

what I had done for him.
The two companies decided to improve their service

for the benefits of

for the benefits of

the customers.

In my opinion

In my opinion

，you need to turn to your tutor for help.
The face-to-face talk between the two managers

formed a foundation

formed a foundation

of their cooperation.