________ in thought, he didn't notice his wallet ________．

Lost; stolen

Having lost; steal

Lost; steal

Losing; stealing

________ from space, the earth, with water ________ seventy percent of its surface, looks like a blue ball．

Seen, covered

Seen, covering

seeing; covered

seeing; covering

The engine of the ship was out of order and the bad weather ________ the helplessness of the crew at sea．

added to

added up to

turned out

made up

Mother ________ Annie to ring back in an hour．

said to

asked

talked to

spoke to

He always prefers ________ a bike to go to work．

ride

to riding

to ride

ride

Can you imagine the difficulty I had ________ these questions?

settled

to settle

settling

settle

It was the second time ________ he ________ to visit China．

that, had come

when, has come

that, has come

when, had come

I'd like to go ________ to help people, ________ when they are in trouble．

straight, especially

straight, specially

straightly, specially

straightly, especially

Mr．Brown is ________ a teacher to us; we consider him as our friend．

more than

more or less

less than

more and more

Most of us can see that British English has some differences ________ American English ________ spelling and pronunciation．

in, from

from, in

from, between

in, between