be keen on，eat out，no less than，be worth，have nothing to do with，in one's opinion，look forward to，not only…but also…，make an effort，at a loss

（1）

In my opinion

In my opinion

，you'd better make an apology to her for your mistake.
（2）They were

at a loss

at a loss

as to what kind of business to start.
（3）I am fond of classical music while he

is keen on

is keen on

pop music.
（4）I hope you give me a chance，and I'll

make an effort

make an effort

to do it well.
（5）Kunqu Opera plays a role in body building

no less than

no less than

yoga.
（6）I hope you can come and

look forward to

look forward to

seeing you soon.
（7）John works very hard.His success

has nothing to do with

has nothing to do with

good luck.
（8）She is too busy to cook by herself，so she

eats out

eats out

all the time.
（9）Although we take an hour a day for exercise，it

is worth

is worth

it.
（10）A smile can

not only

not only

make ourselves happy

but also

but also

enable others to feel delighted.