look out of，wind up，become aware of，come across，be based on，
in one's free time，be likely to，burn down，speaking of，according to

（1）I

came across

came across

a group of children playing.
（2）More than one house was

burnt down

burnt down

in the fire.
（3）The President is about to

wind up

wind up

his visit to China.
（4）

Speaking of

Speaking of

Harry，have you seen him recently？
（5）I suppose you could

look out of

look out of

the window and see lots of scenery.
（6）Unemployment

is likely to

is likely to

go on rising this year.
（7）

According to

According to

the expert，the vase has a history dating from the early Tang Dynasty.
（8）We

became aware of

became aware of

danger approaching us.
（9）The reports

were based on

were based on

inaccurate information.
（10）

In my free time

In my free time

，I like to listen to the radio and play football.