While building a tunnel through the mountain, ______

While building a tunnel through the mountain, _______.

#86096

an underground lake was discovered

there was an underground lake discovered

a lake was discovered underground

the workers discovered an underground lake

推荐题目

The population, one third of which___ farmer workers, __increasing very fast.

#85922

is; are

is; is

are; is

are; are

．He had never envied the rich＿＿＿money．

#86265

his

their

one’s

her

Amy usually _______ from school, but today she goes home by bike.

#43699

walk home

walk to home

walks home

walks to home

There ______a basketball match this afternoon.

#44146

will be

will have

is going to be

is going to have

Every possible means ______ to prevent the air pollution, but the sky is still not clear.

#86302

is used

are used

has been used

have been used

共1265题