First impressions are the most lasting．After all, you never get ________ second chance to make ________ first impression．

a; the

the; the

a; a

the; a

Most parents encourage their children to take an active part in social events, ________ those events do not interfere(干扰)with their studies．

as though

until

unless

so long as

Evidence has been piled up ________ drinking water after getting up in the morning contributes to one’s health．

what

which

if

that

Some equipment as well as a number of maps and books ________ to the area since the earthquake occurred．

has been offered

have been offered

is being offered

are being offered

________ our teacher will allow ________ early after examination?

Who do you think; leaving

Who do you think; to leave

Do you think who; leaving

Do you think who; to leave

When she was a child, she became interested in gymnastics, ________ both strength and skills are needed．

which

where

whose

that

________ your composition carefully, some spelling mistakes can be avoided．

Having checked

Check

If you check

To check

Under no circumstances ________ to the teacher．

is this the first time he has lied

this was the first time he has lied

is this the first time has he lied

this is the first time he is lying

The project ________ by the end of 2015 will greatly expand the city’s telephone network．

accomplished

being accomplished

to be accomplished

having accomplished

Although he knew little about the large amount of work done in the field, he succeeded ________ other well-informed experts failed．

which

that

what

where