选择正确的选项完成句子。

They are dressed in beautiful costumes, ________．

skipping back and forth

skipped back and forth

选择正确的选项完成句子。

Another well-known folk dance is the Yangge, ________．

that is performed on special occasion

which is performed on special occasion

选择正确的选项完成句子。

Folk dances are traditional styles of dancing ________．

come from ordinary people

that come from ordinary people

选择正确的选项完成句子。

Ballet began in Italy and France during the 15th century ________．

and is still an important art form in Western culture

with an important art form in Western culture

When ________ help, one often says “Thank you．” Or “It’s kind of you．”

offering

to offer

to be offered

offered

It’s necessary to be prepared for a job interview．________ the answers ready will be of great help．

To have had

Having had

Have

Having

Unlike watching TV, reading is a highly active process, ________ it requires attention as well as memory and imagination．

until

but

unless

for

I’d like to arrive 20 minutes early ________ I can have time for a cup of tea．

as soon as

as a result

in case

so that

Only then ________ how much damage had been caused．

had she realized

she realized

did she realize

she had realized

In the past, worker ________ work for over 18 hours a day．

is made to

is made

was made to

was made